赛能微S1109S PD27W电源芯片替硅动力SP6639

S1109SC

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Description

S1109SC combines a dedicated current mode PWM

mode controller with a 1Ω/650V MOSFEET.

S1109SC has high efficiency, low standby power

consumption, low EMC and low cost. It is applied to

the off-line flyback converter in the range of 20W

output power.

S1109SCoffers comprehensive protection functions,

including Cycle-by-Cycle current limitation (OCP),

over temperature protection (OTP), Over voltage

clamp (OVP)and under voltage lockout (UVLO) on

VCC.

S1109SC is offered in SOP8 package.

Features

z Digit frequency shuffling technology to improve

EMI performance.

z Fixed 65kHz PWM switching frequency.

z Leading-edge blanking on current sense.

z Internal synchronized slope compensation.

z Low standby power consumption (<75mW@AC

230V)

z Soft-start to reduce MOSFET Vds stress

during power on

z Comprehensive protection function

1、Under voltage locked with hysteresis

(UVLO) on VCC.

2、Over voltage protection (OVP) on VCC.

3、Cycle-by-Cycle current limitation.

4、Over load protection (OLP)

5、Over temperature protection (OTP)

6、Current limitation compensation to

obtain the same output current in universal

ac line input

z Low start-up current (<10uA@VCC=12V)

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Applications

z Cell Phone Charger

z

Digital Cameras Charger

z

Battery charger

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