Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - hot swap controller Multi-purpose VSSOP 10 Surface-mount

VCC SENSE GATE OUT

VREF

PROG

TIMER

GND

8910

SMAJ60A

0.1 µF

0.01 Ω

IRF540NS

470 kΩ

10 Ω

41.2 kΩ

8.25 kΩ

0.1 µF

220 µF

324 kΩ

13.3 kΩ

= 48 Vdc

at 4 A

Power Good

TPS2490/91

LIM

= 5 A,

OFF

= 34.2 V/31.7 V,

LIM

= 34 W,

Timeout = 16 mS

Programmed

SOA, 16mS

VREF

PROG

TIMER

GND

VCC

SENSE

GATE

OUT

DGS Package

(Top View)

3,0 mm X 4,88 mm

Actual Size

TPS2490

TPS2491

www.ti.com

SLVS503D –NOVEMBER 2003–REVISED JULY 2012

POSITIVE HIGH-VOLTAGE POWER-LIMITING HOTSWAP CONTROLLER

Check for Samples: TPS2490, TPS2491

FEATURES

APPLICATIONS

• Programmable Power Limiting and Current

• Server Backplanes

Limiting for Complete SOA Protection

• Storage Area Networks (SAN)

• Wide Operating Range: +9 V to +80 V

• Medical Systems

• Latched Operation (TPS2490) and Automatic

• Plug-in Modules

Retry (TPS2491)

• Base Stations

• High-side Drive for Low-R

DS(on)

External N-

channel MOSFET

• Programmable Fault Timer to Protect the

MOSFET and Eliminate Nuisance Shutdowns

• Power Good Open-Drain Output for

Downstream DC/DC Coordination

• Enable can be used as a Programmable

Undervoltage Lockout or Logic Control

• Small, Space-saving 10-pin MSOP Package

• Calculator Tool Available (SLVC033)

DESCRIPTION

The TPS2490 and TPS2491 are easy-to-use, positive high voltage, 10-pin Hot Swap Power Manager™ devices

that safely drive an external N-channel MOSFET switch. The power limit and current limit (both are adjustable

and independent of each other) ensure that the external MOSFET operates inside a selected safe operating area

(SOA) under the harshest operating conditions. Applications include inrush current limiting, electronic circuit

breaker protection, controlled load turn-on, interfacing to down-stream dc-to-dc converters, and power feed

protection. These devices are available in a small, space-saving 10-pin MSOP package and significantly reduce

the number of external devices, saving precious board space. The TPS2490/91 is supported by application

notes, an evaluation module, and a design tool.

Figure 1. Typical Application and Corresponding SOA

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.

2Hot Swap Power Manager is a trademark 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 (25 pages)

PAGE 1
TPS2490 TPS2491 Actual Size 3,0 mm X 4,88 mm www.ti.
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TPS2490 TPS2491 SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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TPS2490 TPS2491 www.ti.com SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 ELECTRICAL CHARACTERISTICS unless otherwise noted, minimum and maximum limits apply across the recommended operating junction temperature and voltage range, VTIMER = 0 V, and all outputs unloaded; typical specifications are at TJ = 25°C, VVCC = 48 V, VTIMER = 0 V, and all outputs unloaded; positive currents are into pins.
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TPS2490 TPS2491 SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 www.ti.com ELECTRICAL CHARACTERISTICS (continued) unless otherwise noted, minimum and maximum limits apply across the recommended operating junction temperature and voltage range, VTIMER = 0 V, and all outputs unloaded; typical specifications are at TJ = 25°C, VVCC = 48 V, VTIMER = 0 V, and all outputs unloaded; positive currents are into pins. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IPG = 2 mA 0.1 0.25 V IPG = 4 mA 0.25 0.
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TPS2490 TPS2491 www.ti.com SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 TYPICAL CHARACTERISTICS SUPPLY CURRENT vs SUPPLY VOLTAGE CURRENT LIMIT TRIP vs SUPPLY VOLTAGE 600 55 I VCC− Supply Current − mA − Current Limit Trip − mV V( VCC − Sense) TJ = 1255C 550 500 TJ = 255C 450 400 TJ = −405C 350 300 250 200 53 52 TJ = −405C 51 50 TJ = 255C 49 48 TJ = 1255C 47 46 45 9 19 29 39 49 59 VCC − Supply Voltage − V 69 79 9 19 29 39 49 59 VCC − Supply Voltage − V 69 Figure 2. Figure 3.
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TPS2490 TPS2491 SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 www.ti.
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TPS2490 TPS2491 www.ti.com SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 TYPICAL CHARACTERISTICS (continued) TIMER CHARGE/DISCHARGE RATIO vs SUPPLY VOLTAGE AND TEMPERATURE EN THRESHOLD VOLTAGE (FALLING) vs SUPPLY VOLTAGE 1.255 VEN − EN Threshold Voltage (Falling) − V ITimer − Charge/Discharge Ratio 9.80 9.75 TJ = 255C TJ = −405C 9.70 TJ = 1255C 9.65 1.254 1.253 1.252 TJ = 1255C 1.251 TJ = 255C 1.250 1.249 TJ = −405C 1.248 1.247 1.246 9.60 9 19 29 39 49 59 VCC − Supply Voltage − V 69 1.
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TPS2490 TPS2491 SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 www.ti.com FUNCTIONAL BLOCK DIAGRAM 4V Reference 10 VCC Enable 2 VREF Charge Pump Constant Power Engine 22 mA A 3 PROG 50 mV max A 2B V (DS) Detector + B + _ Gate Control Amplifier 8 GATE 14 V − 2 mA I (D) Detector + Power/Current Amplifier − 9 SENSE 2.7 V and 1.25 V 8.4 V and 8.3 V 1 EN Inrush Complete + _ 1.35 V and 1.
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TPS2490 TPS2491 www.ti.com SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 DETAILED PIN DESCRIPTION The following description relies on the Typical Application and Corresponding SOA circuit, and the functional block diagram. VCC: This pin is associated with three functions: 1) biasing power to the integrated circuit, 2) input to power on reset (POR) and under voltage lockout (UVLO) functions, and 3) voltage sense at one terminal of RS for M1 current measurement.
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TPS2490 TPS2491 SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 V PROG + P LIM 10 I LIM www.ti.com (2) where PLIM is the desired power limit of M1 and ILIM is the current limit setpoint (see SENSE). PLIM is determined by the desired thermal stress on M1: T J(MAX) * T S(MAX) P LIM t R qJC(MAX) (3) where TJ(MAX) is the maximum desired transient junction temperature of M1 and TS(MAX) is the maximum case temperature prior to a start or restart.
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TPS2490 TPS2491 www.ti.com SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 APPLICATION INFORMATION BASIC OPERATION The TPS2490/91 provides all the features needed for a positive hotswap controller.
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TPS2490 TPS2491 SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 www.ti.com Action of the Constant Power Engine (Figure 14) The calculated power dissipated in M1, VDS ×ID, is computed under the same startup conditions as Figure 13 . The current of M1, labeled IIN, initially rises to the value that satisfies the constant power engine; in this case it is 34 W ÷ 48 V = 0.7 A. The 34 W value is programmed into the engine by setting the PROG voltage using the equation given in the PROG pin description.
PAGE 13
TPS2490 TPS2491 www.ti.com SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 IIN 0.5 A/div TIMER 1 V/div GATE 10 V/div OUT 10 V/div t - Time - 2 ms/div Figure 15. Current Limit Overview The TPS2490/91 responds rapidly to the short circuit as seen in Figure 16. The falling OUT voltage is the result of M1 and CO currents through the short’s impedance at this time scale. The internal GATE clamp causes the GATE voltage to follow the output voltage down and subsequently limits the negative VDS to 1–2 V.
PAGE 14
TPS2490 TPS2491 SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 www.ti.com Automatic Restart (Figure 17) The TPS2491 automatically initiates a restart after a fault has caused it to turn off M1. Internal control circuits use CT to count 16 cycles before re-enabling M1. This sequence repeats if the fault persists. The TIMER has a 1:10 charge-to-discharge current ratio, and uses a 1-V lower threshold. The fault-retry duty cycle specification quantifies this behavior.
PAGE 15
TPS2490 TPS2491 www.ti.com SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 R DSON(MAX) v T J(MAX) * T A(MAX) R qJA I2 MAX (5) where TJ(MAX) is the desired maximum steady-state junction temperature (typically 125°C), and TA(MAX) is the maximum ambient temperature. RθJA, the junction-to-ambient thermal resistance, depends upon the package style chosen and the details of heat-sinking and cooling. Note the RθJC and RθJA for use below. STEP 3.
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TPS2490 TPS2491 SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 www.ti.com STEP 6. Choose R5, R6, and C1 R5 is intended to suppress high-frequency oscillations; a resistor of 10Ω will serve for most applications but if M1 has a CISS below 200 pF, then use 33 Ω. Applications with larger MOSFETs and short wiring may not require R5. R6 is required only if the PG output drives a circuit that requires it. It is recommended that the sink current be less than 2 mA.
PAGE 17
TPS2490 TPS2491 www.ti.com SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 Faults and Backplane Voltage Droop A hard short at the output of the TPS2490/91 during normal operation could result in activation of the enable or UVLO circuit instead of the current limit if the input voltage droops sufficiently. The lower GATE drive in this condition will cause a prolonged, larger over-current spike. This can be eliminated by filtering EN, or distributing capacitance on the bus itself.
PAGE 18
TPS2490 TPS2491 SLVS503D – NOVEMBER 2003 – REVISED JULY 2012 www.ti.com REVISION HISTORY Note: Page numbers of current version may differ from page numbers of previous versions. Changes from Original (November 2003) to Revision A Page • Deleted Lead temperature spec. from Abs Max Ratings table ............................................................................................. 2 • Changed VPROG MIN voltage spec. from: 0 to: 0.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (4) 18-Oct-2013 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.
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PACKAGE MATERIALS INFORMATION www.ti.com 9-Jan-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 TPS2490DGSR VSSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 TPS2491DGSR VSSOP DGS 10 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 9-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS2490DGSR VSSOP DGS 10 2500 366.0 364.0 50.0 TPS2491DGSR VSSOP DGS 10 2500 366.0 364.0 50.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.