Weltrend WT7525-N140, WT7525-N160, WT7525-N161, WT7525-N180, WT7525-N181 Schematic [ru]

Weltrend Semiconductor, Inc.

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WT7525

PC POWER SUPPLY SUPERVISOR

Data Sheet

REV. 0.40 Preliminary release

February 21, 2005

The information in this document is subject to change without notice. ©Weltrend Semiconductor, Inc. All Rights Reserved.

24 2

2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan TEL:[phone] FAX:[phone].5770419 Email:[e-mail]

WT7525 Preliminary release

Rev. 0.40

GENERAL DESCRIPTION

The WT7525 provides protection circuits, power good output (PGO), fault protection latch (FPOB), and a protection detector function (PSONB) control. It can minimize external components of switching power supply systems in personal computer.

The Over / Under Voltage Detector (OVD / UVD) monitors V33, V5, V12A, V12B and V12C input voltage level. The Over Current Detector (OCD) monitor IS33, IS5, IS12A, IS12B and IS12C input current sense. When OVD or UVD or OCD detect the fault voltage level, the FPOB is latched HIGH and PGO go low. The latch can be reset by PSONB go HIGH. There is 3.5 ms delay time for PSONB turn off FPOB.

When OVD and UVD and OCD detect the right voltage level, the power good output (PGO) will be issue.

FEATURES

∙The Over/Under Voltage Detector (OVD / UVD) monitors V33, V5, V12A, V12B and V12C input voltage.

∙The Over Current Detector (OCD) monitors IS33, IS5, IS12A, IS12B and IS12C input current sense.

∙Both of the power good output (PGO) and fault protection latch (FPOB) are Open Drain Output.

∙75 / 300 ms time delay for UVD.

∙300 ms time delay for PGO.

∙38 ms for PSONB input signal De–bounce.

∙73 us for PGI/OVD/UVD internal signal De–glitches.

∙1.2 ms for OCD internal signal De–glitches.

∙3.5 ms time delay for PSONB turn-off FPOB.

Weltrend Semiconductor, Inc.

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WT7525 Preliminary release

Rev. 0.40

PIN ASSIGNMENT AND PACKAGE TYPE

	WT7525-140						WT7525-160						WT7525-161
PGI		1	14		PGO	PGI		1	16		PGO	PGI		1	16		PGO
GND		2	13		VCC	GND		2	15		VCC	GND		2	15		VCC
FPOB		3	12		V5	FPOB		3	14		V5	FPOB		3	14		V5
PSONB		4	11		V33	PSONB		4	13		V33	PSONB		4	13		V33
I12AB		5	10		V12A	I12A		5	12		V12A	I12A		5	12		NC
RI		6	9		I33	RI		6	11		I33	RI		6	11		V12A
V12B		7	8		I5	NC		7	10		I5	I5		7	10		I33
						V12B		8	9		I12B	V12B		8	9		I12B
							WT7525-180						WT7525-181
						PGI		1	18		PGO	PGI		1	18		PGO
						GND		2	17		VCC	GND		2	17		VCC
						FPOB		3	16		V5	FPOB		3	16		V5
						PSONB		4	15		V33	PSONB		4	15		V33
						I12A		5	14		V12A	I12A		5	14		NC
						RI		6	13		I33	RI		6	13		V12A
						NC		7	12		I5	I5		7	12		I33
						V12B		8	11		I12B	V12B		8	11		I12B
						V12C		9	10		I12C	V12C		9	10		I12C

ORDERING INFORMATION

	PACKAGE	14–Pin Plastic DIP	14–Pin Plastic SOP
		WT7525–N140	WT7525–S140
	Lead–Free Pb	WT7525–N140 Pb	WT7525–S140 Pb
	PACKAGE	16–Pin Plastic DIP	16–Pin Plastic SOP
		WT7525–N160	WT7525–S160
		WT7525–N161	WT7525–S161
	Lead–Free Pb	WT7525–N160 Pb	WT7525–S160 Pb
		WT7525–N161 Pb	WT7525–S161 Pb
	PACKAGE	18–Pin Plastic DIP	18–Pin Plastic SOP
		WT7525–N180	WT7525–S180
		WT7525–N181	WT7525–S181
	Lead–Free Pb	WT7525–N180 Pb	WT7525–S180 Pb
		WT7525–N181 Pb	WT7525–S181 Pb

The Top-Side Marking would be added a dot●in the right side for lead-free package.

Weltrend Semiconductor, Inc.

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		WT7525 Preliminary release
		Rev. 0.40
PIN DESCRIPTION
Pin Name	TYPE	Description
PGI	I	Power good input signal pin
GND	P	Ground
FPOB	O	Fault protection output pin, open drain output
PSONB	I	On/Off switch input
I12A	I	12VA over current protection sense input
I12AB	I	12VA / 12VB over current protection sense input (only for 140)
RI	I	Current sense adjust input
V12B	I	12VB over/under voltage input pin
V12C	I	12VC over/under voltage input pin
I12C	I	12VC over current protection sense input
I12B	I	12VB over current protection sense input
I5	I	5V over current protection sense input
I33	I	3.3V over current protection sense input
V12A	I	12VA over/under voltage input pin
V33	I	3.3V over/under voltage input pin
V5	I	5V over/under voltage input pin
VCC	I	Power supply
PGO	O	Power good output signal pin, open drain output

Weltrend Semiconductor, Inc.

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WT7525 Preliminary release

Rev. 0.40

BLOCK DIAGRAM

WT7525-140
VCC
	PWR	Power On Reset		PWR
VCCI
PSONB	38ms	clr	3.5ms
	debounce		delay
1.2V ~ 1.8V
					Bandgap	VREF = 1.2V
		clr	75ms / 300ms		Reference
			delay
VREF = 1.2V	- UN
V33	+				Internal
						VCCI = 3.6V
					Power
	-OV
	+
V5	- UN
	+
					PWR
	-OV
	+
	- UN				OSC	CLK
V12A
	+
	-OV
	+
V12B	-		clr
	+ UN
			73us
	-OV	debounce
	+
			clr	R		FPOB
			1.2ms	S	Q
		debounce
		clr				PGO
PGI	+ UN	73us	clr	300ms
VREF = 1.2V	-	debounce		delay
	V12A
I33	-			V12A
	+
	IREF * 8
				V12A
	V12A		VREF = 1.2V	+	IREF=VREF / RI
				-
	-
I5						RI
	+
	IREF * 8
	V12A
I12AB	-
	+
	IREF * 8
	V12A
	-
	+

Weltrend Semiconductor, Inc.

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WT7525 Preliminary release

Rev. 0.40

WT7525-160 / 161
VCC
	PWR	Power On Reset		PWR
VCCI
PSONB	38ms	clr	3.5ms
	debounce		delay
1.2V ~ 1.8V
					Bandgap	VREF = 1.2V
		clr	75ms / 300ms		Reference
			delay
VREF = 1.2V	- UN
V33	+				Internal
						VCCI = 3.6V
					Power
	-OV
	+
V5	- UN
	+
					PWR
	-OV
	+
	- UN				OSC	CLK
V12A
	+
	-OV
	+
V12B	-		clr
	+ UN
			73us
	-OV	debounce
	+
			clr	R		FPOB
			1.2ms	S	Q
		debounce
		clr				PGO
PGI	+ UN	73us	clr	300ms
VREF = 1.2V	-	debounce		delay
	V12A
I33	-			V12A
	+
	IREF * 8
				V12A
	V12A		VREF = 1.2V	+	IREF=VREF / RI
				-
	-
I5						RI
	+
	IREF * 8
	V12A
I12A	-
	+
	IREF * 8
	V12A
I12B	-
	+
	IREF * 8

Weltrend Semiconductor, Inc.

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