The TPS2320 and TPS2321 are dual-channel hot-swap controllers that use external N-channel MOSFETs as high-side switches in power applications

TPS2320

Manufacturer Part NumberTPS2320
DescriptionThe TPS2320 and TPS2321 are dual-channel hot-swap controllers that use external N-channel MOSFETs as high-side switches in power applications
ManufacturerTexas Instruments
TPS2320 datasheet
 


Specifications of TPS2320

No. Of Outputs2Vin(min)(v)3
Vin(max)(v)13Pin/package16SOIC, 16TSSOP
OperationLatch OffEnableActive Low
OutputFLTCircuit Breaker FunctionIndependent
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DUAL HOT SWAP POWER CONTROLLERS
WITH INDEPENDENT CIRCUIT BREAKER
FEATURES
Dual-Channel High-Side MOSFET Drivers
IN1: 3 V to 13 V; IN2: 3 V to 5.5 V
Output dV/dt Control Limits Inrush Current
Independent Circuit-Breaker With
Programmable Overcurrent Threshold and
Transient Timer
CMOS- and TTL-Compatible Enable Input
Low, 5- A Standby Supply Current (Max)
Available in 16-Pin SOIC and TSSOP Package
–40 C to 85 C Ambient Temperature Range
Electrostatic Discharge Protection
APPLICATIONS
Hot-Swap/Plug/Dock Power Management
Hot-Plug PCI, Device Bay
Electronic Circuit Breaker
DESCRIPTION
The TPS2320 and TPS2321 are dual-channel
hot-swap controllers that use external N-channel
MOSFETs
as
high-side
switches
applications. Features of these devices, such as
overcurrent protection (OCP), inrush-current control,
and the ability to
discriminate between load
transients and faults, are critical requirements for
hot-swap applications.
A
The TPS2320/21 devices incorporate undervoltage lockout (UVLO) to ensure the device is off at startup. Each
internal charge pump, capable of driving multiple MOSFETs, provides enough gate-drive voltage to fully
enhance the N-channel MOSFETs. The charge pumps control both the rise times and fall times (dv/dt) of the
MOSFETs, reducing power transients during power up/down. The circuit-breaker functionality combines the
ability to sense overcurrent conditions with a timer function; this allows designs such as DSPs, that may have
high peak currents during power-state transitions, to disregard transients for a programmable period.
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.
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.
SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006
GATE1
GATE2
DGND
TIMER
VREG
AGND
ISENSE2
ISENSE1
NOTE: Terminal 14 is active-high on TPS2321.
typical application
V1
3 V–13 V
IN1
ISET1
VREG
AGND
DGND
ENABLE
IN2
ISET2
in
power
V2
3 V–5.5 V
Copyright © 2000–2006, Texas Instruments Incorporated
TPS2320
TPS2321
D OR PW PACKAGE
(TOP VIEW)
1
16
DISCH1
2
15
DISCH2
3
14
ENABLE
4
13
FAULT
5
12
ISET1
6
11
ISET2
7
10
IN2
8
9
IN1
V
O1
+
DISCH1
ISENSE1 GATE1
TPS2320
FAULT
TIMER
GATE2
ISENSE2
DISCH2
V
O2
+

TPS2320 Summary of contents

  • Page 1

    ... A The TPS2320/21 devices incorporate undervoltage lockout (UVLO) to ensure the device is off at startup. Each internal charge pump, capable of driving multiple MOSFETs, provides enough gate-drive voltage to fully enhance the N-channel MOSFETs. The charge pumps control both the rise times and fall times (dv/dt) of the MOSFETs, reducing power transients during power up/down. The circuit-breaker functionality combines the ability to sense overcurrent conditions with a timer function ...

  • Page 2

    ... Table 1. Terminal Functions Analog ground, connects to DGND as close as possible Digital ground Discharge transistor 1 Discharge transistor 2 Active low (TPS2320) or active high enable (TPS2321) Overcurrent fault, open-drain output Connects to gate of channel 1 high-side MOSFET Connects to gate of channel 2 high-side MOSFET Input voltage for channel 1 Input voltage for channel 2 ...

  • Page 3

    ... ISET2 11 I Adjusts circuit-breaker threshold with resistor connected to IN2 TIMER 4 O Adjusts circuit-breaker deglitch time VREG 5 O Connects to bypass capacitor, for stable operation Table 1. Terminal Functions (continued) DESCRIPTION Submit Documentation Feedback TPS2320 TPS2321 SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006 3 ...

  • Page 4

    ... GATE1 and GATE2 voltages will power up to turn on the external MOSFETs. When the ENABLE pin is pulled high for TPS2320 or the ENABLE pin is pulled low for TPS2321 for more than 50 µs, the gate of the MOSFET is discharged at a controlled rate by a current source, and a transistor is enabled to discharge the output bulk capacitance ...

  • Page 5

    ... DERATING FACTOR ABOVE 10.98 mW/ C 8.98 mW I(ISET1 I(ISET2) I(VREG) Submit Documentation Feedback TPS2320 TPS2321 SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006 VALUE UNIT –0 –0 –0 –0 –0 100 –40 to 100 – ...

  • Page 6

    ... Fall time, GATE2 f(GATE2) (1) Specified, but not production tested. 6 < TEST CONDITIONS (TPS2321), I(ENABLE (TPS2320) I(ENABLE (TPS2321), I(ENABLE (TPS2320) I(ENABLE 500 nA, DISCH1 open I(GATE1 13 5.5 V, I(IN1) O(VREG I(GATE1) I(IN1 ...

  • Page 7

    ... Threshold voltage, circuit breaker IT(CB) I Input bias current, I (IB_ISENSEx) SENSEx Discharge current, GATEx Propagation (delay) time, t pd(CB) comparator inputs to gate output ENABLE, ACTIVE LOW (TPS2320) V High-level input voltage, ENABLE IH(ENABLE) V Low-level input voltage, ENABLE IL(ENABLE) R Input pullup resistance, ENABLE I(ENABLE) t Turnoff delay time, ENABLE ...

  • Page 8

    ... TPS2320 TPS2321 SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006 ELECTRICAL CHARACTERISTICS (Continued) over recommended operating temperature range (–40 C < T noted) PARAMETER VREG UVLO V Output threshold voltage, start (TO_UVLOstart) V Output threshold voltage, stop (TO_UVLOstop) V Hysteresis hys(UVLO) UVLO sink current, GATEx FAULT OUTPUT ...

  • Page 9

    ... V I( ENABLE ) 5 V/div V O(GATE1) 10 V/div V O(DISCH1) 5 V/div Figure 2. Turnoff Voltage Transition of Channel 1 Load 5 W Load ENABLE ) 5 V/div V O(GATE2) 10 V/div V O(DISCH2) 5 V/div Figure 4. Turnoff Voltage Transition of Channel 2 Submit Documentation Feedback TPS2320 TPS2321 t – Time – 10 ms/div t – Time – 10 ms/div 9 ...

  • Page 10

    ... TPS2320 TPS2321 SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006 PARAMETER MEASUREMENT INFORMATION (continued ENABLE ) 5 V/div V O(GATE1) 10 V/div V O( FAULT ) 10 V/div I O(OUT1) 2 A/div t – Time – 5 ms/div Figure 5. Channel 1 Overcurrent Response: Enabled Into Overcurrent Load No Capacitor on Timer V I( ENABLE ) 5 V/div ...

  • Page 11

    ... O(GATE2) 5 V/div V O( FAULT ) 10 V/div I I(IN2) 2 A/div Figure 10. Channel 2 – Enabled Into Short Circuit V I(IN1) 10 V/div V O(GATE1) 10 V/div V O(OUT1) 10 V/div I O(OUT1) 1 A/div Figure 12. Channel 1 –Hot Removal Submit Documentation Feedback TPS2320 TPS2321 t – Time – 1 ms/div No Capacitor on Timer t – Time – 1 ms/div 11 ...

  • Page 12

    ... TPS2320 TPS2321 SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006 PARAMETER MEASUREMENT INFORMATION (continued) 5 V/div V O(GATE2) 10 V/div V 5 V/div I 1 A/div V O(GATE2) 10 V/div V O(OUT2) I O(OUT2) 1 A/div 12 No Capacitor on Timer V I(IN2) O(OUT2) O(OUT2) t – Time – 5 ms/div Figure 13. Channel 2 - Hot Plug V I(IN2) ...

  • Page 13

    ... T = –40° 0° 2.5 Submit Documentation Feedback TPS2320 TPS2321 SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006 INPUT CURRENT 2 (ENABLED) vs INPUT VOLTAGE 0° –40° 25° 85° 3.5 4 4.5 5 5.5 V – ...

  • Page 14

    ... TPS2320 TPS2321 SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006 TYPICAL CHARACTERISTICS (continued) GATE1 OUTPUT VOLTAGE vs INPUT VOLTAGE 1000 pF L(GATE1 – Input Voltage 1 – Figure 19. GATE1 VOLTAGE FALL TIME vs GATE1 LOAD CAPACITANCE ...

  • Page 15

    ... TEMPERATURE Start Stop –45–35–25–15 – – Temperature – °C A Figure 25. Submit Documentation Feedback TPS2320 TPS2321 SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006 LOAD VOLTAGE 1 DISCHARGE TIME vs LOAD CAPACITANCE = 25°C A 100 200 300 400 C – ...

  • Page 16

    ... OUTPUT CAPACITOR A 0.1- F ceramic capacitor is recommended per load on the TPS2320/21; these capacitors should be placed close to the external FETs and to TPS2320/21. A larger bulk capacitor is also recommended on the load. The value of the bulk capacitor should be selected based on the power requirements and the transients generated by the application ...

  • Page 17

    ... For most applications, a minimum capacitance recommended to prevent false triggering. A capacitor should be connected between TIMER and ground. The presence of an overcurrent condition on either channel of the TPS2320/TPS2321 causes a 50- A current source to begin charging this capacitor. If the over-current condition persists until the capacitor has been charged to approximately 0.5 V, the TPS2320/TPS2321 latches off the offending channels and pulls the FAULT pin low ...

  • Page 18

    ... One such application is device bay, where dv/dt control of 3 and required. By using Channel 2 to drive both the 3.3-V and 5-V power rails and Channel 1 to drive the 12-V power rail shown below, TPS2320/01 can deliver three different voltages to three loads while monitoring the status of two of the loads. ...

  • Page 19

    ... TIMER IN2 ISET2 ISENSE2 GATE2 R R ISET2 SENSE2 Figure 27. Three-Channel Application – Time – 2.5 ms/div Figure 28. Submit Documentation Feedback TPS2320 TPS2321 SLVS276E – MARCH 2000 – REVISED NOVEMBER 2006 DISCH1 FAULT FAULT DISCH2 ...

  • Page 20

    ... Orderable Device (1) Package Type Package Status TPS2320ID ACTIVE SOIC TPS2320IDG4 ACTIVE SOIC TPS2320IDR ACTIVE SOIC TPS2320IDRG4 ACTIVE SOIC TPS2320IPW ACTIVE TSSOP TPS2320IPWG4 ACTIVE TSSOP TPS2320IPWR ACTIVE TSSOP TPS2320IPWRG4 ACTIVE TSSOP TPS2321ID ACTIVE SOIC TPS2321IDG4 ACTIVE SOIC TPS2321IPW ACTIVE TSSOP TPS2321IPWG4 ACTIVE ...

  • Page 21

    Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): ...

  • Page 22

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing TPS2320IDR SOIC TPS2320IPWR TSSOP PW TPS2321IPWR TSSOP PW PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel Diameter Width (mm) W1 (mm 2500 330.0 16.4 16 2000 330.0 12.4 16 2000 330.0 12.4 Pack Materials-Page 1 A0 ...

  • Page 23

    ... Device Package Type TPS2320IDR SOIC TPS2320IPWR TSSOP TPS2321IPWR TSSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 2500 PW 16 2000 PW 16 2000 Pack Materials-Page 2 29-Jul-2011 Width (mm) Height (mm) 333.2 345.9 28.6 346.0 346.0 29.0 346.0 346.0 29.0 ...

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    ... 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. All products are sold subject to TI’ ...