WT7520 데이터 시트보기 (PDF) - Weltrend Semiconductor

부품명

상세내역

제조사

WT7520

PC Power Supply PWM Cupervisor

Weltrend Semiconductor 

WT7520

Data Sheet Rev. 0.90

PIN DESCRIPTION

Pin No.

1 V33

2 V5

3 V12

4 PT

5 GND

6 RT

7 C1

8 C2

9 REM

Pin Name

10 SS

11 PG

12 DET

13 VCC

14 OPOUT

15 OPNEGIN

16 VADJ

TYPE

I

I

I

I

P

O

O

O

I

O

O

I

P

O

I

I

FUNCTION

OVP/UVP input FOR 3.3V.

OVP/UVP input for 5V.

OVP/UVP input for 12V.

Extra OVP protection input.

Ground.

Oscillation frequency set by external resistor.

PWM open drain output 1.

PWM open drain output 2.

Remote on/off input.

REM=”low” that means the main SMPS is turned-on.

REM=”high”, the main SMPS is turned-off.

Soft start function set by external capacitor.

Power good signal.

PG= ”high” means “power good”.

PG= ”low” means “power fail”.

Extra protection input.

Supply voltage.

OP compensation output.

OP compensation negative input.

OP compensation positive input , feedback voltage sense input.

*The difference between WT7905 and WT7520

ITEM

WT7905

Pin-6

CT; external capacitor

(PWM frequency)

Pin-10

TPG; external capacitor

(PG delay-time function)

OVP-3.3V,5V,12V 100us (Typ.)

UVP-3.3V,5V,12V 100us (Typ.)

Soft-Start function

Set by internal circuit

Pin-4

(PT)

PT default 0.8V (with internal

voltage divided resistors)

WT7520

RT; external resistor

(ex. 120kΩ)

SS; external capacitor

(Soft-start function)

510us (Typ.)

110us (Typ.)

Set by external capacitor

(Pin-10:SS)

PT default 0.8V. (with internal

voltage divided resistors)

(24K+4.6K)

Weltrend Semiconductor, Inc.

Page 3

Share Link: