CS51021A 데이터 시트보기 (PDF) - ON Semiconductor

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CS51021A

Enhanced Current Mode PWM Controller

ON Semiconductor 

CS51021A, CS51022A, CS51023A, CS51024A

VCC

LGND

SLEEP

SYNC

RTCT

−+

COMP

+

2.5 V −

VFB

VREF

53 mA

SLOPE

ISENSE

Q2

ISET

OV

+

Start

Stop

−

VCC_OK

VREF = 5.0 V

4.3 V

200 ns

OSC

+

4.75 V

−

−

VREF_OK

+

+

SS

Clamp

−

+

E/A

−

−

D2

ISET

Clamp

+

D3

20 k

D1

10 k

−

VFB

Monitor

+

+

G4

− 2.0 V

0.1

Σ

0.1 V

−+

DISABLE

55 ns

Blank

0.8

VREF

12.5 mA

+

− 2.5 V

1.33

+

OV

Monitor

−

G1

−

PWM

Comp

+

−

SS

Monitor

+

VISENSE

+

2nd

Threshold

−

VREF

VC

SQ

F1

G2

D4

R

GATE

ZD1

13.5 V

PGND

VREF

55 mA

SS

+

− 4.7 V

G3

Discharge

FAULT

Latch

−

UV

UV

Monitor

+

+

1.45 V −

Figure 2. Block Diagram

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