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FEATURES APPLICATIONS

DESCRIPTION

PTV08040W

SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008

www.ti.com

50-A, 8-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT

ADJUST, VERTICAL POWER MODULE

• Advanced Computing and Server Applications

• 50-A Output Current

• 8-V to 14-V Input Voltage

• Wide-Output Voltage Adjust (0.8 V to 3.6 V)

• Efficiencies up to 95%

• On/Off Inhibit

• Differential Output Sense

• Output Overcurrent Protection

(Nonlatching, Auto-Reset)

• Overtemperature Protection

• Auto-Track™ Sequencing

• Start Up Into Output Prebias

• Operating Temperature: – 40 ° C to 85 ° C

• Multi-Phase, Switch-Mode Topology

• Programmable Undervoltage Lockout (UVLO)

• Safety Agency Approvals: (Pending)

UL/IEC/CSA-22.2 60950-1

The PTV08040W is a high-performance 50-A rated, non-isolated, power module, that uses the latest multi-phase

switched-mode topology. This provides a small, ready-to-use module, that can power the most densely populated

multiprocessor systems. The PTV08040W is produced in a 21-pin, single in-line pin (SIP) package. The SIP

footprint minimizes board space, and offers an alternate package option for space conscious applications. The

modules use double-sided surface mount construction to provide a low profile and compact footprint.

Operating from an input voltage range of 8 V to 14 V, the PTV08040W requires a single resistor to set the output

voltage to any value over the range, 0.8 V to 3.6 V. The wide input voltage range makes the PTV08040W

particularly suitable for advanced computing and server applications that utilize a loosely regulated intermediate

distribution bus of 8 V to 14 V.

The PTV08040W incorporates Auto-Track™ sequencing. The Auto-Track feature of the PTH and PTV family

allows the outputs of multiple modules to track a common voltage during power up and power down transitions.

This simplifies power up and power down supply-voltage sequencing in a power supply system.

The module incorporates a comprehensive list of features. They include on/off inhibit, a differential remote output

voltage sense which ensures tight load regulation, and an output overcurrent and overtemperature shutdown to

protect against load faults. The programmable undervoltage lockout allows the turn-on and turn-off voltage

thresholds to be customized.

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.

2 Auto-Track, TMS320 are trademarks of Texas Instruments.

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 (23 pages)

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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 50-A, 8-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT ADJUST, VERTICAL POWER MODULE FEATURES APPLICATIONS • • • • • • • • 1 2 • • • • • • • 50-A Output Current 8-V to 14-V Input Voltage Wide-Output Voltage Adjust (0.8 V to 3.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 ELECTRICAL CHARACTERISTICS TA = 25°C, VI = 12 V, VO = 3.3 V, CI = 560 µF, CO = 150 F, and IO = IOmax (unless otherwise stated) PARAMETER TEST CONDITIONS MIN TYP MAX 25°C, Natural Convection 0 50 (1) 60°C, 200 LFM airflow 0 48 (1) UNIT IO Output current 8 V ≤ VI ≤ 14 V VI Input voltage range Over IO range VOtol Set-point voltage tolerance ΔRegtemp Temperature variation –40°C < TA < 85°C ±0.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 DEVICE INFORMATION PTV08040W (Top View) PIN 1 TERMINAL FUNCTIONS TERMINAL NAME DESCRIPTION NO. This is the common ground connection for the VI and VO power connections. It is also the 0 Vdc reference for the control inputs. GND 4, 5, 11, 12, 18, 19 VI 6, 7, 13, 14, 20, 21 The positive input voltage power node to the module, which is referenced to common GND.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 TYPICAL CHARACTERISTICS (VI = 12 V) (1) (2) EFFICIENCY vs LOAD CURRENT POWER DISSIPATION vs LOAD CURRENT VO = 2.5 V VO = 3.3 V PD - Power Dissipation - W Efficiency - % VO = 3.3 V VO = 1.8 V VO = 1.2 V VO = 0.8 V VO = 2.5 V VO = 1.8 V VO = 1.2 V VO = 0.8 V IO- Output Current - A IO- Output Current - A Figure 2.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 TYPICAL CHARACTERISTICS (VI = 8 V) (1) (2) EFFICIENCY vs LOAD CURRENT POWER DISSIPATION vs LOAD CURRENT VO = 2.5 V Efficiency - % VO = 1.2 V VO = 1.8 V VO = 0.8 V VO = 3.3 V PD - Power Dissipation - W VO = 3.3 V VO = 2.5 V VO = 1.8 V VO = 1.2 V VO = 0.8 V IO- Output Current - A Figure 5. Figure 6.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 APPLICATION INFORMATION CAPACITOR RECOMMENDATIONS FOR THE PTV08040W POWER MODULE The PTV08040W is a state-of-the-art multi-phase power converter topology that uses three parallel switching and filter inductor paths between the common input and output filter capacitors. The three paths share the load current, operate at the same frequency, and are evenly displaced in phase.
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PTV08040W SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 www.ti.com Tantalum Capacitors Tantalum type capacitors are only used on the output bus, and are recommended for applications where the ambient operating temperature is less than 0°C. The AVX TPS, Sprague 593D/594/595, and Kemet T495/T510 capacitor series are suggested over many other tantalum types due to their higher rated surge, power dissipation, and ripple current capability.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 Table 1. Input/Output Capacitors (1) Capacitor Characteristics Capacitor Vendor, Type Series (Style) Working Voltage Value (µF) Max. ESR at 100 kHz Max Ripple Current at 85°C (Irms) 25 V 1000 0.043 Ω 25 V 560 0.065 Ω 16 V 680 35 V United Chemi-Con MVZ(SMD) LXZ, Aluminum (Radial) Quantity Physical Size (mm) Input Bus Output Bus >1690 mA 16 × 15 1 1 EEUFC1E102S 1205 mA 12,5 × 15 1 1 EEUFC1E561S 0.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 ADJUSTING THE OUTPUT VOLTAGE OF THE PTV08040W WIDE-OUTPUT ADJUST POWER MODULE The VO Adjust control (pin 8) sets the output voltage of the PTV08040W product. The adjustment range is from 0.8 V to 3.6 V. The adjustment method requires the addition of a single external resistor, RSET, that must be connected directly between the VO Adjust and GND pins.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 Table 3. Output Voltage Set-Point Resistor Values VO RSET VO RSET VO RSET 0.8 Open 1.375 34.8 kΩ 2.4 7.87 kΩ 0.825 953 kΩ 1.4 33.2 kΩ 2.45 7.50 kΩ 0.85 475 kΩ 1.425 31.6 kΩ 2.5 6.98 kΩ 0.875 316 kΩ 1.45 30.1 kΩ 2.55 6.65 kΩ 0.9 232 kΩ 1.475 28.7 kΩ 2.6 6.19 kΩ 0.925 187 kΩ 1.5 27.4 kΩ 2.65 5.90 kΩ 0.95 154 kΩ 1.55 24.9 kΩ 2.7 5.49 kΩ 0.975 130 kΩ 1.6 22.6 kΩ 2.75 5.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 ADJUSTING THE UNDERVOLTAGE LOCKOUT (UVLO) OF THE PTV08040W POWER MODULES The PTV08040W power modules incorporate an input undervoltage lockout (UVLO). The UVLO feature prevents the operation of the module until there is sufficient input voltage to produce a valid output voltage.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 Hysterisis Adjust The hysterisis voltage, VHYS, is the difference between the ON and OFF threshold values. The default value is 1 V and it can only be adjusted to a lower value. Caution should be used when changing the hysterisis voltage to a lower value, as it could permit start-up oscillations. Any change in the hysterisis voltage requires both RHYS and RTHD resistors be in place. Adding RHYS alone does not have the desired effect.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 FEATURES OF THE PTH/PTV FAMILY OF NONISOLATED WIDE OUTPUT ADJUST POWER MODULES Soft-Start Power Up The Auto-Track feature allows the power-up of multiple PTH/PTV modules to be directly controlled from the Track pin. However in a stand-alone configuration, or when the Auto-Track feature is not being used, the Track pin should be directly connected to the input voltage, VI (see Figure 11).
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 The output then progressively rises to the module’s setpoint voltage. Figure 12 shows the soft-start power-up characteristic of the PTV08040W operating from a 12-V input bus and configured for a 3.3-V output. The waveforms were measured with a 20-A constant current load and the Auto-Track feature disabled. The initial rise in input current when the input voltage first starts to rise is the charge current drawn by the input capacitors.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 Output On/Off Inhibit For applications requiring output voltage on/off control, the PTV08040W incorporates an output Inhibit control pin. The inhibit feature can be used wherever there is a requirement for the output voltage from the regulator to be turned off.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 Auto-Track™ Function The Auto-Track function is unique to the PTH/PTV family, and is available with all POLA products. Auto-Track was designed to simplify the amount of circuitry required to make the output voltage from each module power up and power down in sequence.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 Notes on Use of Auto-Track™ 1. The Track pin voltage must be allowed to rise above the module set-point voltage before the module regulates at its adjusted set-point voltage. 2. The Auto-Track function tracks almost any voltage ramp during power up, and is compatible with ramp speeds of up to 1 V/ms. 3. The absolute maximum voltage that may be applied to the Track pin is the input voltage VI. 4.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 VTRK (1 V/div) VTRK (1 V/div) VO1 (1 V/div) VO1 (1 V/div) VO2 (1 V/div) VO2 (1 V/div) t - Time = 20 ms/div t - Time = 400 ms/div Figure 16. Simultaneous Power Up With Auto-Track Control Figure 17. Simultaneous Power Down With Auto-Track Control Prebias Startup Capability A prebias startup condition occurs as a result of an external voltage being present at the output of a power module prior to its output becoming active.
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PTV08040W www.ti.com SLTS257B – SEPTEMBER 2005 – REVISED JANUARY 2008 UVLO Threshold VI (5 V/Div) VO1 (1 V/Div) VO (1 V/Div) VO2 (1 V/Div) IO2 (5 A/Div) Startup Period HORIZTAL SCALE: 10 ms/Div HORIZTAL SCALE: 5 ms/Div Figure 18. PTH08040W Startup Figure 19. Prebias Startup Waveforms Note 1. The prebias start-up feature is not compatible with Auto-Track.
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PACKAGE OPTION ADDENDUM www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.