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LM96000

www.ti.com

SNAS234C –APRIL 2004–REVISED MARCH 2013

LM96000 Hardware Monitor with Integrated Fan Control

Check for Samples: LM96000

FEATURES

KEY SPECIFICATIONS

• 2-wire, SMBus 2.0 Compliant, Serial Digital

• Voltage Measurement Accuracy ±2% FS (max)

Interface

• Resolution 8-bits, 1°C

• 8-bit ΣΔ ADC

• Temperature Sensor Accuracy ±3°C (max)

• Monitors VCCP, 2.5V, 3.3 VSBY, 5.0V, and 12V

• Temperature Range

Motherboard/processor Supplies

– LM96000 Operational 0°C to +85°C

• Monitors 2 Remote Thermal Diodes

– Remote Temp Accuracy 0°C to +125°C

• Programmable Autonomous Fan Control

• Power Supply Voltage +3.0V to +3.6V

Based on Temperature Readings

• Power Supply Current 0.53 mA

• Noise Filtering of Temperature Reading for

Fan Control

DESCRIPTION

• 1.0°C Digital Temperature Sensor Resolution

The LM96000, hardware monitor, has a two wire

• 3 PWM Fan Speed Control Outputs

digital interface compatible with SMBus 2.0. Using an

8-bit ΣΔ ADC, the LM96000 measures:

• Provides High and Low PWM Frequency

• the temperature of two remote diode connected

Ranges

transistors as well as its own die

• 4 Fan Tachometer Inputs

• the VCCP, 2.5V, 3.3VSBY, 5.0V, and 12V

• Monitors 5 VID Control Lines

supplies (internal scaling resistors).

• 24-pin TSSOP Package

To set fan speed, the LM96000 has three PWM

• XOR-tree Test Mode

outputs that are each controlled by one of three

temperature zones. High and low PWM frequency

APPLICATIONS

ranges are supported. The LM96000 includes a

digital filter that can be invoked to smooth

• Desktop PC

temperature readings for better control of fan speed.

• Microprocessor based equipment

The LM96000 has four tachometer inputs to measure

– (e.g. Base-stations, Routers, ATMs, Point of

fan speed. Limit and status registers for all measured

Sales)

values are included.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (40 pages)

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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 LM96000 Hardware Monitor with Integrated Fan Control Check for Samples: LM96000 FEATURES KEY SPECIFICATIONS • • • • • 1 2 • • • • • • • • • • • • 2-wire, SMBus 2.0 Compliant, Serial Digital Interface 8-bit ΣΔ ADC Monitors VCCP, 2.5V, 3.3 VSBY, 5.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com Block Diagram SERIAL BUS INTERFACE VID0 VID1 VID2 VID3 VID4 VID0-4 REGISTER SMBDAT SMBCLK VOLTAGE, FAN SPEED, TEMPERATURE, AND LIMIT VALUE REGISTERS TACH1 TACH2 FAN SPEED COUNTER TACH3 TACH4/ Address Select LIMIT COMPARATORS VDD STEPPING AND DEVICE ID REGISTERS 3.3SBY 5VIN STATUS REGISTERS CONFIGURATION REGISTERS ADDRESS POINTER REGISTER 12VIN 2.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 Pin Descriptions SMBus Processor VID Lines Name Pin No. Type SMBDAT 1 Digital I/O (Open-Drain) System Management Bus Data. Open-drain output. 5V tolerant, SMBus 2.0 compliant. SMBCLK 2 Digital Input System Management Bus Clock. Tied to Open-drain output. 5V tolerant, SMBus 2.0 compliant. VID0 5 Digital Input Voltage identification signal from the processor. This value is read in the VID0–VID4 Status Register.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com Absolute Maximum Ratings (1) (2) (3) Supply Voltage, V+ −0.5V to 6.0V Voltage on Any Digital Input or Output Pin −0.5V to 6.0V Voltage on 12V Analog Input −0.5V to 16V −0.5V to 6.66V Voltage on 5V Analog Input −0.5V to (V+ + 0.05V) Voltage on Remote1+, Remote2+, Current on Remote1−, Remote2− ±1 mA −0.5V to 6.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 DC Electrical Characteristics The following specifications apply for V+ = 3.0V to 3.6V, and all analog input source impedance RS = 50Ω unless otherwise specified in conditions. Boldface limits apply for TA = TJ over TMIN =0°C to TMAX=85°C; all other limits TA =TJ= 25°C. TA is the ambient temperature of the LM96000; TJ is the junction temperature of the LM96000; TD is the thermal diode junction temperature.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com DC Electrical Characteristics (continued) The following specifications apply for V+ = 3.0V to 3.6V, and all analog input source impedance RS = 50Ω unless otherwise specified in conditions. Boldface limits apply for TA = TJ over TMIN =0°C to TMAX=85°C; all other limits TA =TJ= 25°C. TA is the ambient temperature of the LM96000; TJ is the junction temperature of the LM96000; TD is the thermal diode junction temperature.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 AC Electrical Characteristics (continued) The following specifications apply for V+ = 3.0V to 3.6V unless otherwise specified in conditions. Boldface limits apply for TA = TJ over TMIN =0°C to TMAX=85°C; all other limits TA =TJ= 25°C.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 Pin No. Pin Name Circuit 5 VID0 A 6 VID1 7 VID2 8 VID3 9 TACH3 www.ti.com All Input Circuits V+ ESD Clamp D2 160 k D3 80 k D1 6.5V GND Figure 3. Circuit B 10 PWM2 11 TACH1 12 TACH2 13 PWM3/AddEnable 14 TACH4/AddSel V+ D3 50: PIN D1 D2 ESD CLAMP D4 6.5V GND Figure 4. Circuit C 15 REMOTE2− C 16 REMOTE2+ D 17 REMOTE1− C 18 REMOTE1+ D 19 VID4 A V+ D2 50: PIN D1 SNP ESD CLAMP D3 6.5V GND Figure 5.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 PWM3/Address Enable pin is not used to change the SMBus address of the LM96000, it will remain in a high state until the first communication with the LM96000. After the first SMBus transaction is completed PWM3 and TACH4 will return to normal operation. Address Enable Address Select Board Implementation SMBus Address 0 0 Pulled to ground through a 10 kΩ 010 1100b, 2Ch resistor 0 1 Pulled to 3.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com – – [67-69h] Set the fan temperature limits. – – [6A-6Ch] Set the temperature absolute limits. – – [64-66h] Set the PWM minimum duty cycle. – – [6D-6Eh] Set the temperature Hysteresis values. 2. [40h] Set bit 0 (START) to update fan control and limit register values and start fan control based on these new values. 3. [40h] Set bit 1 (LOCK) to lock the fan limit and parameter registers (optional). 3.
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LM96000 www.ti.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.
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LM96000 www.ti.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com Register Read/ Address Write Register Name Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB) Default Value Lock? 75h Fan Spin-up Mode RES RES RES RES RES PWM3 SU PWM2 SU PWM1 SU 7h ✓ R/W 4.1 Register 20-24h: Voltage Reading Register Address Read/ Write Register Name Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 0 (LSB) Bit 1 Default Value 20h R 2.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 Table 1. Temperature vs Register Reading (continued) Temperature Reading (Dec) Reading (Hex) . . . . . . . . . 127°C 127 7Fh (SENSOR ERROR) 80h 4.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com 4.4 Register 30-32h: Current PWM Duty Register Address Read/ Write Register Name Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 0 (LSB) Bit 1 Default Value 30h R/W Fan1 Current PWM Duty 7 6 5 4 3 2 1 0 N/A 31h R/W Fan2 Current PWM Duty 7 6 5 4 3 2 1 0 N/A 32h R/W Fan3 Current PWM Duty 7 6 5 4 3 2 1 0 N/A The Current PWM Duty registers store the current duty cycle at each PWM output.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 The four least significant bits of the Version/Stepping register [3.0] contain the current stepping of the LM96000 silicon. The four most significant bits [7.4] reflect the LM96000 base device number when set to a value of 0110b. For the LM96000, this register will read 01101000b (68h). Bit 3 of the stepping field is set to indicate that the LM96000 is a super-set of the LM85 family of products.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 Bit Name R/W www.ti.com Default Description 0 2.5V_Error R 0 The LM96000 automatically sets this bit to 1 when the 2.5V input voltage is less than or equal to the limit set in the 2.5V Low Limit register or greater than the limit set in the 2.5V High Limit register.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 Bit Name R/W Default Description 6 Remote Diode 1 Fault R 0 The LM96000 automatically sets this bit to 1 when there is either a short or open circuit fault on the Remote1+ or Remote1− thermal diode input pins. A diode fault will also set bit 4, Diode 1 Zone Limit bit, of Interrupt Status Register 1.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com Table 2. Voltage Limits vs Register Setting Register Setting at Nominal Voltage Nominal Voltage Input Maximum Voltage Register Reading at Maximum Voltage Register Reading at Minimum Voltage Minimum Voltage 2.5V 2.5V C0h 3.32V FFh 0V 00h VCCP 2.25V C0h 3.00V FFh 0V 00h 3.3V 3.3V C0h 4.38V FFh 3.0V AFh 5V 5.0V C0h 6.64V FFh 0V 00h 12V 12.0V C0h 16.00V FFh 0V 00h 4.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 Table 3. Temperature Limits vs Register Settings (continued) Temperature Reading (Decimal) Reading (Hex) . . . . . . . . . 50°C 50 32h . . . . . . . . . 127°C 127 7Fh 4.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com Setting the Ready/Lock/Start/Override register Lock bit has no effect these registers. 4.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 Table 5. Fan Spin-Up Register SPIN[2:0] Spin Up Time 000 0 sec 001 100 ms 010 250 ms 011 400 ms 100 700 ms 101 1000 ms 110 2000 ms 111 4000 ms 4.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com Example for PWM1 assigned to Zone 1: • – Zone 1 Fan Temp Limit (Register 67h) is set to 50°C (32h). • – Range (Register 5Fh) is set to 8°C (6xh). • – Fan 1 PWM Minimum (Register 64h) is set to 50% (32h). In this case, the PWM1 duty cycle will be 50% at 50°C. Since (Zone 1 Fan Temp Limit) + (Zone 1 Range) = 50°C + 8°C = 58°C, the fan will run at 100% duty cycle when the temperature of the Zone 1 sensor reaches 58°C.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 RAN [3:0] Range (°C) 1100 32 1101 40 1110 53.33 1111 80 This register becomes Read Only when the Ready/Lock/Start/Override register Lock bit is set. Any further attempts to write to this register shall have no effect. After power up the default value is used whenever the Ready/Lock/Start/Override register Start bit is cleared even though modifications to this register are possible. 4.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com Table 7. Spike Smoothing ZN-X[2:0] Spike Smoothed Over 000 35 seconds 001 17.6 seconds 010 11.8 seconds 011 7.0 seconds 100 4.4 seconds 101 3.0 seconds 110 1.6 seconds 111 .8 seconds Table 8. PWM Output Below Limit Depending on Value of Off/Min Off/Min PWM Action 0 At 0% duty below LIMIT 1 At Min PWM Duty below LIMIT 4.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 PWM Duty Cycle vs Register Setting for PWM High Frequency Range 22.5KHz PWM Frequency PWM Duty Cycle Level (%) Value in Decimal 0.00 0 Value in Hex 0 6.25 1 - 15 01 - 0F 12.50 16 - 31 10 - 1F 18.75 32 - 47 20 - 2F 25.00 48 - 63 30 - 3F 31.25 64 - 79 40 - 4F 37.50 80 - 95 50 - 5F 43.75 96 - 111 60 - 6F 50.00 112 - 127 70 - 7F 56.25 128 - 143 80 - 8F 62.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com 25.7KHz PWM Frequency PWM Duty Cycle Level (%) Value in Decimal Value in Hex 50.00 110 - 127 6E - 7F 57.14 128 - 145 80 - 91 64.29 146 - 164 92 - A4 71.43 165 - 182 A5 - B6 78.57 183 - 200 B7 - C8 85.71 201 - 218 C9 - DA 92.86 219 - 237 DB - ED 100.00 238 - 255 EE - FF 27.7KHz PWM Frequency PWM Duty Cycle Level (%) Value in Decimal 0 Value in Hex 0 0 7.69 1 - 19 01 - 13 15.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 4.18 Registers 67-69h: Temperature Limit Register Address Read/ Write Register Name Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 0 (LSB) Bit 1 Default Value Lock? 67h R/W Zone1 Fan Temp Limit 7 6 5 4 3 2 1 0 5Ah ✓ 68h R/W Zone2 Fan Temp Limit 7 6 5 4 3 2 1 0 5Ah ✓ 69h R/W Zone3 Fan Temp Limit 7 6 5 4 3 2 1 0 5Ah ✓ These are the temperature limits for the individual zones.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com 4.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 If the temperature is above Fan Temp Limit, then drops below Fan Temp Limit, the following will occur: • – The fan will remain on, at Fan PWM Minimum, until the temperature goes a certain amount below Fan Temp Limit. • – The Hysteresis registers control this amount. See below table for details. These registers become Read Only when the Ready/Lock/Start/Override register Lock bit is set.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.
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LM96000 www.ti.com SNAS234C – APRIL 2004 – REVISED MARCH 2013 5.0 XOR TEST MODE The LM96000 incorporates a XOR tree test mode. When the test mode is enabled by setting the “XEN” bit high in the Test Register at address 6Fh via the SMBus, the part will enter XOR test mode. Since the test mode an XOR tree, the order of the signals in the tree is not important. SMBDAT and SMBCLK are not to be included in the test tree.
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LM96000 SNAS234C – APRIL 2004 – REVISED MARCH 2013 www.ti.com REVISION HISTORY Changes from Revision B (March 2013) to Revision C • 34 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM96000CIMTX TSSOP PW 24 2500 330.0 16.4 6.95 8.3 1.6 8.0 16.0 Q1 LM96000CIMTX/NOPB TSSOP PW 24 2500 330.0 16.4 6.95 8.3 1.6 8.0 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM96000CIMTX TSSOP PW 24 2500 367.0 367.0 35.0 LM96000CIMTX/NOPB TSSOP PW 24 2500 367.0 367.0 35.
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