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HA16158P Datasheet(PDF) 11 Page - Renesas Technology Corp |
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HA16158P Datasheet(HTML) 11 Page - Renesas Technology Corp |
11 / 24 page HA16158P/FP Rev.2.00 Jan 30, 2007 page 11 of 23 Functional Description 1. UVL Circuit The UVL circuit monitors the Vcc voltage and halts operation of the IC in the event of a low voltage. The voltage for detecting Vcc has a hysteresis characteristic, with 16.0 V as the start threshold and 10.0 V as the shutdown threshold. When the IC has been halted by the UVL circuit, control is performed to fix driver circuit output low and halt VREF output and the oscillator. Vcc VREF V_CT (internal signal) PWM-RESET (internal signal) PWM-OUT PFC-OUT PFC-DT (internal signal) PFC-RAMP (internal signal) 16.0V 10.0V 4.5V 4.5V Figure 1 |
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