Texas Instruments TPS2321IPWR, TPS2321IPW, TPS2321IDR, TPS2321ID, TPS2320IPWR Datasheet

TPS2320, TPS2321 DUAL HOT SWAP POWER CONTROLLER WITH INDEPENDENT CIRCUIT BREAKER

SLVS276A ± MARCH 200 ± REVISED APRIL 2000

features

DDual-Channel High-Side MOSFET Drivers

DIN1: 3 V to 13 V; IN2: 3 V to 5.5 V

DInrush Current Limiting With dv/dt Control

DIndependent Circuit-Breaker Control With Programmable Current Limit and Transient Timer

DCMOSand TTL-Compatible Enable Input

DLow, 5- A Standby Supply Current . . . Max

DAvailable in 16-Pin SOIC and TSSOP Package

D±40°C to 85°C Ambient Temperature Range

DElectrostatic Discharge Protection

D OR PW PACKAGE

(TOP VIEW)

GATE1			1	16			DISCH1
GATE2			2	15			DISCH2
DGND			3	14			ENABLE
TIMER			4	13			FAULT
VREG			5	12			ISET1
			6	11
AGND							ISET2
ISENSE2			7	10			IN2
			8	9
ISENSE1							IN1

NOTE: Terminal 14 is active high on TPS2321.

typical application

applications

DHot-Swap/Plug/Dock Power Management

DHot-Plug PCI, Device Bay

DElectronic Circuit Breaker

description

The TPS2320 and TPS2321 are dual-channel hot-swap controllers that use external N-channel MOSFETs as high-side switches in power applications. Features of these devices, such as overcurrent protection (OCP), inrush-current control, and separation of load transients from actual load increases, are critical requirements for hot-swap applications.

VO1

+

V1

3 V ± 13 V

	IN1 ISET1 ISENSE1 GATE1	DISCH1
VREG
AGND	TPS2320
DGND		FAULT
		TIMER

ENABLE

IN2	ISET2 ISENSE2	GATE2	DISCH2
			VO2
V2			+
	3 V ± 5.5 V

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.

AVAILABLE OPTIONS

	TA	HOT-SWAP CONTROLLER DESCRIPTION		PIN			PACKAGES
				COUNT	ENABLE			ENABLE
		Dual-channel with independent OCP and adjustable PG		20	TPS2300IPW			TPS2301IPW
		Dual-channel with interdependent OCP and adjustable PG		20	TPS2310IPW			TPS2311IPW
	± 40°C to 85°C	Dual-channel with independent OCP		16	TPS2320ID			TPS2321ID
					TPS2320IPW			TPS2321IPW
		Single-channel with OCP and adjustable PG		14	TPS2330ID			TPS2331ID
					TPS2330IPW			TPS2331IPW

² The packages are available left-end taped and reeled (indicated by the R suffix on the device type; e.g., TPS2321IPWR).

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 Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Copyright 2000, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

1

TPS2320, TPS2321

DUAL HOT SWAP POWER CONTROLLER

WITH INDEPENDENT CIRCUIT BREAKER

SLVS276A ± MARCH 200 ± REVISED APRIL 2000

functional block diagram

IN1

ISET1

ISENSE1 GATE1

DISCH1

VREG	PREREG		Clamp
			dv/dt Rate
			Protection
	50 A	Circuit	Charge
			Pump
		Breaker

Pulldown FET

AGND

UVLO and

Circuit Breaker

Power-Up

DGND

75 A

FAULT

ENABLE

Logic

50- s Deglitch

TIMER

Second Channel

IN2

ISET2

ISENSE2

GATE2

DISCH2

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

AGND

6

I

Analog ground, connects to DGND as close as possible

DGND

3

I

Digital ground

DISCH1

16

O

Discharge transistor 1

DISCH2

15

O

Discharge transistor 2

ENABLE

14

I

Active low (TPS2320) or active high enable (TPS2321)

ENABLE/

FAULT

13

O

Overcurrent fault, open-drain output

GATE1

1

O

Connects to gate of channel 1 high-side MOSFET

GATE2

2

O

Connects to gate of channel 2 high-side MOSFET

IN1

9

I

Input voltage for channel 1

IN2

10

I

Input voltage for channel 2

ISENSE1

8

I

Current-sense input channel 1

ISENSE2

7

I

Current-sense input channel 2

ISET1

12

I

Adjusts circuit-breaker threshold with resistor connected to IN1

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

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

TPS2320, TPS2321

DUAL HOT SWAP POWER CONTROLLER

WITH INDEPENDENT CIRCUIT BREAKER

SLVS276A ± MARCH 200 ± REVISED APRIL 2000

detailed description

DISCH1, DISCH2 ± DISCH1 and DISCH2 should be connected to the sources of the external N-channel MOSFET transistors connected to GATE1 and GATE2, respectively. These pins discharge the loads when the MOSFET transistors are disabled. They also serve as reference-voltage connections for internal gate voltage-clamp circuitry.

ENABLE or ENABLE ± ENABLE for TPS2320 is active low. ENABLE for TPS2321 is active high. When the controller is enabled, both 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 s, 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. In addition, the device turns on the internal regulator PREREG (see VREG) when enabled and shuts down PREREG when disabled so that total supply current is much less than 5 A.

FAULT ± FAULT is an open-drain overcurrent flag output. When an overcurrent condition in either channel is sustained long enough to charge TIMER to 0.5 V, the overcurrent channel latches off and pulls FAULT low. The other channel will run normally if not in overcurrent.

GATE1, GATE2 ± GATE1 and GATE2 connect to the gates of external N-channel MOSFET transistors. When the device is enabled, internal charge-pump circuitry pulls these pins up by sourcing approximately 15 A to each. The turnon slew rates depend upon the capacitance present at the GATE1 and GATE2 terminals. If desired, the turnon slew rates can be further reduced by connecting capacitors between these pins and ground. These capacitors also reduce inrush current and protect the device from false overcurrent triggering during powerup. The charge-pump circuitry will generate gate-to-source voltages of 9 V±12 V across the external MOSFET transistors.

IN1, IN2 ± IN1 and IN2 should be connected to the power sources driving the external N-channel MOSFET transistors connected to GATE1 and GATE2, respectively. The TPS2320/TPS2321 draws its operating current from IN1, and both channels will remain disabled until the IN1 power supply has been established. The IN1 channel has been constructed to support 3-V, 5-V, or 12-V operation, while the IN2 channel has been constructed to support 3-V or 5-V operation

ISENSE1, ISENSE2, ISET1, ISET2 ± ISENSE1 and ISENSE2, in combination with ISET1 and ISET2, implement overcurrent sensing for GATE1 and GATE2. ISET1 and ISET2 set the magnitude of the current that generates an overcurrent fault, through external resistors connected to ISET1 and ISET2. An internal current source draws 50 A from ISET1 and ISET2. With a sense resistor from IN1 to ISENSE1 or from IN2 to ISENSE2, which is also connected to the drains of external MOSFETs, the voltage on the sense resistor reflects the load current. An overcurrent condition is assumed to exist if ISENSE1 is pulled below ISET1 or if ISENSE2 is pulled below ISET2.

TIMER ± A capacitor on TIMER sets the time during which the power switch can be in overcurrent before turning off. When the overcurrent protection circuits sense an excessive current, a current source is enabled which charges the capacitor on TIMER. Once the voltage on TIMER reaches approximately 0.5 V, the circuit-breaker latch is set and the power switch is latched off. Power must be recycled or the ENABLE pin must be toggled to restart the controller. In high-power or high-temperature applications, a minimum 50-pF capacitor is strongly recommended from TIMER to ground, to prevent any false triggering.

VREG ± The VREG pin is the output of an internal low-dropout voltage regulator. This regulator draws current from IN1. A 0.1- F ceramic capacitor should be connected between VREG and ground. VREG can be connected to IN1, IN2, or to a separated power supply through a low-resistance resistor. However, the voltage on VREG must be less than 5.5 V.

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

3

TPS2320, TPS2321

DUAL HOT SWAP POWER CONTROLLER

WITH INDEPENDENT CIRCUIT BREAKER

SLVS276A ± MARCH 200 ± REVISED APRIL 2000

absolute maximum ratings over operating free-air temperature (unless otherwise noted)²

Input voltage range:	VI(IN1), VI(ISENSE1), VI(ISET1), VI(ENABLE) . . . . . . . . . . . . . . . . . . .	. . . . ±0.3 V to 15	V
	VI(IN2), VI(ISENSE2), VI(ISET2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . ±0.3 V to 7	V
Output voltage range: VO(GATE1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. . . . ±0.3 V to 30	V
	VO(GATE2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . ±0.3 V to 22V
	VO(DISCH1), VO(FAULT), VO(VREG), VO(DISCH2), VO(TIMER),	. . . . . ±0.3 V to 15V
Sink current range:	IGATE1, IGATE2, IDISCH1, IDISCH2 . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . 0 mA to 100 mA
	ITIMER, IFAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . 0 mA to 10 mA
Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. . . ±40°C to 100°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. . . ±55°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . .		. . . . . . . . . . . 260°C

² Stresses beyond those listed under ªabsolute maximum ratingsº may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltages are respect to DGND.

DISSIPATION RATING TABLE

	PACKAGE	TA ≤ 25°C	DERATING FACTOR	TA = 70°C	TA = 85°C
		POWER RATING	ABOVE TA = 25°C	POWER RATING	POWER RATING
	PW-16	823 mW	10.98 mW/°C	329 mW	165 mW
	D-16	674 mW	8.98 mW/°C	270 mW	135 mW

recommended operating conditions

			MIN NOM	MAX	UNIT
	Input voltage, VI	VI(IN1), VI(ISENSE1), VI(ISET1)	3	13	V
		VI(IN2), VI(ISENSE2), VI(ISET2)	3	5.5
	VREG voltage, VO(VREG), when VREG is directly connected to IN1		2.95	5.5	V
	Operating virtual junction temperature, TJ		±40	100	°C

4	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

TPS2320, TPS2321

DUAL HOT SWAP POWER CONTROLLER

WITH INDEPENDENT CIRCUIT BREAKER

SLVS276A ± MARCH 200 ± REVISED APRIL 2000

electrical characteristics over recommended operating temperature range (±40°C < TA < 85°C), 3 V ≤ VI(IN1) ≤13 V, 3 V ≤ VI(IN2) ≤ 5.5 V (unless otherwise noted)

general

	PARAMETER		TEST CONDITIONS			MIN TYP	MAX	UNIT
II(IN1)	Input current, IN1	VI(ENABLE) = 5			V (TPS2321),	0.5	1	mA
								A
II(IN2)	Input current, IN2	V	I(ENABLE)	= 0	V (TPS2320)	75	200
	Standby current (sum of currents into IN1, IN2,	VI(ENABLE) = 0			V (TPS2321),
II(stby)	ISENSE1, ISENSE2, ISET1, and ISET2)						5	A
		VI(ENABLE) = 5 V (TPS2320)

GATE1

	PARAMETER		TEST CONDITIONS		MIN	TYP	MAX	UNIT
VG(GATE1_3V)			II(GATE1) = 500 nA,	VI(IN1) = 3 V	9	11.5
VG(GATE1_4.5V)		Gate voltage		VI(IN1) = 4.5 V	10.5	14.5		V
			DISCH1 open
VG(GATE1_10.8V)				VI(IN1) = 10.8 V	16.8	21
VC(GATE1)		Clamping voltage, GATE1			9	10	12	V
		to DISCH1
IS(GATE1)		Source current, GATE1	3 V ≤ VI(IN1) ≤ 13.2 V, 3 V ≤ VO(VREG) ≤ 5.5 V,		10	14	20	A
			VI(GATE1) = VI(IN1) + 6 V
		Sink current, GATE1	3 V ≤ VI(IN1) ≤ 13.2 V, 3 V ≤ VO(VREG) ≤ 5.5 V,		50	75	100	A
			VI(GATE1) = VI(IN1)
				VI(IN1) = 3 V		0.5
tr(GATE1)		Rise time, GATE1	Cg to GND = 1 nF (see Note 2)	VI(IN1) = 4.5 V		0.6		ms
				VI(IN1) = 10.8 V		1
				VI(IN1) = 3 V		0.1
tf(GATE1)		Fall time, GATE1	Cg to GND = 1 nF (see Note 2)	VI(IN1) = 4.5 V		0.12		ms
				VI(IN1) = 10.8 V		0.2

GATE2

	PARAMETER		TEST CONDITIONS			MIN	TYP	MAX	UNIT
	VG(GATE2_3V)	Gate voltage	II(GATE2) = 500 nA, DISCH2 open		VI(IN2) = 3 V	9	11.7		V
	VG(GATE2_4.5V)				VI(IN2) = 4.5 V	10.5	14.7
	VC(GATE2)	Clamping voltage,				9	10	12	V
		GATE2 to DISCH2
	IS(GATE2)	Source current,	3 V ≤ VI(IN2) ≤ 5.5 V,	3 V ≤ VO(VREG) ≤ 5.5 V,		10	14	20	A
		GATE2	VI(GATE2) = VI(IN2)	+ 6 V
		Sink current, GATE2	3 V ≤ VI(IN2) ≤ 5.5 V,	3 V ≤ VO(VREG) ≤ 5.5 V,		50	75	100	A
			VI(GATE2) = VI(IN2)
	tr(GATE2)	Rise time, GATE2	Cg to GND = 1 nF	VI(IN2) = 3 V			0.5		ms
			(see Note 2)	VI(IN2) = 4.5 V	VO(VREG) = 3 V		0.6
	tf(GATE2)	Fall time, GATE2	Cg to GND = 1 nF	VI(IN2) = 3 V			0.1		ms
			(see Note 2)	VI(IN2) = 4.5 V			0.12

NOTE 2: Specified, but not production tested.

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

5

ENABLE, active high (TPS2321)

ENABLE, active low (TPS2320)

circuit breaker

TPS2320, TPS2321

DUAL HOT SWAP POWER CONTROLLER

WITH INDEPENDENT CIRCUIT BREAKER

SLVS276A ± MARCH 200 ± REVISED APRIL 2000

electrical characteristics over recommended operating temperature range (±40°C < TA < 85°C), 3 V ≤ VI(IN1) ≤13 V, 3 V ≤ VI(IN2) ≤ 5.5 V ( unless otherwise noted) (continued)

TIMER

PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
VOT(TIMER) Threshold voltage, TIMER		0.4	0.5	0.6	V
Charge current, TIMER	VI(TIMER) = 0 V	35	50	65	µA
Discharge current, TIMER	VI(TIMER) = 1 V	1	2.5		mA

		PARAMETER	TEST CONDITIONS		MIN	TYP	MAX	UNIT
VIT(CB)		Undervoltage voltage, circuit breaker	RISETx = 1 kΩ		40	50	60	mV
IIB(ISENSEx)		Input bias current, ISENSEx				0.1	5	µA
		Discharge current, GATEx	VO(GATEx) = 4 V		400	800		mA
			VO(GATEx) = 1 V		25	150
tpd(CB)		Propagation (delay) time, comparator inputs to	Cg = 50 pF,	10 mV overdrive,		1.3		µs
		gate output	(50% to 10%)	CO(timer) = 50 pF

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V

High-level input voltage,

2

V

IH(ENABLE)

ENABLE

V

Low-level input voltage,

0.8

V

IL(ENABLE)

ENABLE

Input pullup resistance,

kΩ

RI(ENABLE)

See Note 3

100

200

300

ENABLE

V

increasing above stop threshold; 100

I(ENABLE)

µs

td_off(ENABLE)

Turnoff delay time, ENABLE

60

ns rise time, 20 mV overdrive (see Note 2)

V

decreasing below start threshold;

I(ENABLE)

µs

td_on(ENABLE)

Turnon delay time, ENABLE

125

100 ns fall time, 20 mV overdrive (see Note 2)

NOTES: 2. Specified, but not production tested.

1 V

3. Test IO of ENABLE at VI(ENABLE) = 1 V and 0 V, then RI(ENABLE) =

IO_0V

IO_1V

	PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
VIH(ENABLE)	High-level input voltage, ENABLE		2			V
VIL(ENABLE)	Low-level input voltage, ENABLE				0.7	V
RI(ENABLE)	Input pulldown resistance,		100	150	300	kΩ
	ENABLE
td_on(ENABLE)	Turnon delay time, ENABLE	VI(ENABLE) increasing above start threshold;		85		µs
		100 ns rise time, 20 mV overdrive (see Note 2)
td_off(ENABLE)	Turnoff delay time, ENABLE	VI(ENABLE) decreasing below stop threshold;		100		µs
		100 ns fall time, 20 mV overdrive (see Note 2)

NOTE 2: Specified, but not production tested.

PREREG

	PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
VREG	PREREG output voltage	4.5 ≤ VI(IN1) ≤ 13 V	3.5	4.1	5.5	V
Vdrop_PREREG	PREREG dropout voltage	VI(IN1) = 3 V			0.1	V

6	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

TPS2320, TPS2321

DUAL HOT SWAP POWER CONTROLLER

WITH INDEPENDENT CIRCUIT BREAKER

SLVS276A ± MARCH 200 ± REVISED APRIL 2000

electrical characteristics over recommended operating temperature range (±40°C < TA < 85°C), 3 V ≤ VI(IN1) ≤13 V, 3 V ≤ VI(IN2) ≤ 5.5 V (unless otherwise noted) (continued)

VREG UVLO

	PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
VOT(UVLOstart)	Output threshold voltage, start		2.75	2.85	2.95	V
VOT(UVLOstop)	Output threshold voltage, stop		2.65	2.78		V
Vhys(UVLO)	Hysteresis		50	75		mV
	UVLO sink current, GATEx	VI(GATEx) = 2 V	10			mA

FAULT output

	PARAMETER	TEST CONDITIONS	MIN TYP MAX	UNIT
VO(sat)(FAULT)	Output saturation voltage, FAULT	IO = 2 mA	0.4	V
Ilkg(FAULT)	Leakage current, FAULT	VO(FAULT) = 13 V	1	A

DISCH1 and DISCH2

	PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
IDISCH	Discharge current, DISCHx	VI(DISCHx) = 1.5 V, VI(VIN1) = 5 V	5	10		mA
VIH(DISCH)	Discharge on high-level input voltage		2			V
VIL(DISCH)	Discharge on low-level input voltage				1	V

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

7