CR6203 데이터 시트보기 (PDF) - Unspecified

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CR6203

Switching Power Supply Controller ICs

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CR6203

Pull-up/pull-down Current of the Oscillator: at normal phase, FB is 2.5V, CT is 1.25V, and CT is in

pull-up/pull-down current.

FB Pull-up Current: Pull-up current on FB at normal phase when FB is 2.5V, IS is 0V.

FB Upper Limit Current Prevention: The pull-down current on FB at normal phase when FB is 6V, IS is

0.3V.

Internal Feedback Power Voltage: VCC value of CR6203 power supply of the circuit without peripheral

standby at normal phase

OC Upper Limit Voltage: the minimum OC current of pull-down current on FB when FB is 6V

Ramp current drive: it refers to the power transistor base drive OB on-current is the function of IS, when

IS is 0V, on-current OB is about 40mA, then on-current OB will increase linearly with IS, when IS is

increased to 0.6V, on-current OE is about 120mA.

Fig.1 OPEN/CLOSED CYCLE WAVES IN NORMAL OPERATION

Fig.2 OVERALL SIGNAL WAVEFORMS OF CR6203

Aug.2008 V2.0

7/14

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