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AP2152 Datasheet(PDF) 7 Page - Asahi Kasei Microsystems |
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AP2152 Datasheet(HTML) 7 Page - Asahi Kasei Microsystems |
7 / 18 page [AP2152] MS1348-E-00 7 2012/05 *1. Normally, when 4.25V is applied to VIN for shorter than 100μs, while the PWM pin is kept at a low level, the IC will be in the standby mode. However, if 4.25V is applied to VIN for longer than 300μs, the current consumption of the IC is about 900μA. In order to get the IC into standby mode, after inputting a H level to the PWM pin for more than 36μs , a L level needs to be maintained for more than 50ms. Figure 3. Power Supply Rising Time and Standby mode Interface (AC Timing) Value Parameter Symbol MIN TYP MAX Unit Condition PWM 15 30 μs Before Startup PWM Minimum High Time 1 TPWM_MIN1 ● 15 36 μs Before Startup PWM Minimum High Time 2 TPWM_MIN2 ● 5 7 μs After Startup Shutdown Time TSD ● 20 30 50 ms PWM Dimming Frequency Range FPWM 0.1 20 kHz FPWM≤FOSC / 65 SYNC SYNC Input Frequency Range FSYNC ● 0.21 2.5 MHz SYNC Input Duty DSYNC ● 20 80 % Serial Timing SCLK Cycle tSCKP 10 μs SCLK Pulse Width tSCKW 5 μs SDATA Delay tSDTW 3 μs SCLK SDATA tSCKP tSCKW tSCKW tSDTW Figure 4. Serial Interface Wave Form PWM Standby mode VIN 36µs or longer 4.2V 0 0 50ms or longer approx 900µA IDD approx 5mA approx 5µA 300µs or longer |
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