SC8913 EVM USER GUIDE
SOUTHCHIP SEMICONDUCTOR
SOUTHCHIP CONFIDENTIAL
Copyright © 2018, Southchip Semiconductor Technology (Shanghai) Co., Ltd
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5.5
Discharging Efficiency
fsw = 300kHz, L = 2.2uH, RS1 = 10mR, RS2 = 5mR, COMP = 10k + 22nF, PFM mode
VBAT= 4.2V, VBUS=5V/9V/12V
VBAT= 3.6V, VBUS=5V/9V/12V
VBAT= 3.0V, VBUS=5V/9V/12V
5.6
Supply Current
fsw = 300kHz, L = 2.2uH, RS1 = 10mR, RS2 = 5mR, COMP = 10k + 22nF, VBAT=3.6V
Test Condition
Test Result
PSTOP=3.3V, VBUS floating, AD_START=0 Measure
current into VBAT
I_SB_VBAT=48.2uA
(Note: VBUS resistor divider consumes 30uA
because VBAT flows through body diode to VBUS)
PSTOP=3.3V, VBUS floating, Measure current into
VBAT, AD_START=1
I_SB_VBAT_ADC=495uA
