NCP1294 View Datasheet(PDF) - ON Semiconductor

Part Name

Description

Manufacturer

NCP1294

Flyback, Boost, Forward PWM Controller

ON Semiconductor 

NCP1294

VCC

+

UVL

−

VREF = 3.3 V

ENABLE

3.3 V

−

VREF OK

+

− UV Lockout

Start/Stop

3.1 V

+

S

SYNC

RTCT

OSC

2.0 V to 1.0 V Trip Points

VFB

COMP

VBG

3.0 V

(1.263 V)

−

+

EAMP

+

−

Max Duty Cycle

(Sat Sense)

SS to 1.8 V Max

+

−

Soft−Start Clamp

G2 R

PWM

+ Comp

−

2.0 mA (maximum load current)

VREF

Thermal

Shutdown

VC

Low Sat

Gate Driver

Q

G1

GATE

Q

13.5 V

VREF

50 mA

PGND

LGND

ON

FF

ISET

ISENSE

FF Discharge

VO Off

Latching

G4

Discharge

SS

5.0 mA

G3

OV Monitor +

OV

Max SS

Det

3.0 V

+

−

−

2.0 V

DISABLE 150 ns

Blank

ILIM

−

+

(Sat Sense)

UV Monitor

−

UV

+

1.0 V

Figure 2. Block Diagram

http://onsemi.com

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