分析vcore的33v5v力量管理者電路(英文)(編輯修改稿)
2025-02-11 11:19 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 selects the 5V fixed output voltage setting when tied to GND. Connect FB5 to a resistor divider for adjustableoutput mode.12 Introduce typical control IC specification of MAX 1632 Controller (Cont.)Pin DescriptionPIN NAME FUNCTION13 CSL5 CurrentSense Input for the 5V serves as the feedback input in fixedoutput mode, and as the bootstrap supply input when the voltage on CSL5/VL is .14 CSH5 CurrentSense Input for the 5V SMPS. Currentlimit level is 100mV referred to CSL5.15 SEQ PinStrap Input that selects the SMPS powerup sequence:SEQ = GND: 5V before , RESET output determined by both outputs。 SEQ = REF: Separate ON3/ON5 controls, RESET output determined by output。 SEQ = VL: before 5V, RESET output determined by both outputs16 DH5 GateDrive Output for the 5V, highside Nchannel switch. DH5 is a floating driver output that swings from LX5 to BST5, riding on the LX5 switching node voltage.17 LX5 Switching Node (inductor) Connection. Can swing 2V below ground without hazard.18 BST5 Boost capacitor connection for highside gate drive ()13 Introduce typical control IC specification of MAX 1632 Controller (Cont.)Pin DescriptionPIN NAME FUNCTION19 DL5 GateDrive Output for the lowside synchronousrectifier MOSFET. Swings 0V to VL.20 PGND Power Ground21 VL 5V Internal LinearRegulator Output. VL is also the supply voltage rail for the chip. After the 5V SMPS output has reached + (typical), VL automatically switches to the output voltage via CSL5 for to GND with . VL supplies up to 25mA for external loads.22 V+ Battery Voltage Input, + to +30V. Bypass V+ to PGND close to the IC with a capacitor. Connects to a linear regulator that powers VL.23 /SHDN Shutdown Control Input, active low. Logic threshold is set at approximately 1V. For automatic startup, connect SHDN to V+ through a 220k189。 resistor and bypass SHDN to GND with a capacitor.24 DL3 GateDrive Output for the lowside synchronousrectifier MOSFET. Swings 0V to VL.14 Introduce typical control IC specification of MAX 1632 Controller (Cont.)Pin DescriptionPIN NAME FUNCTION25 BST3 Boost Capacitor Connection for highside gate dr
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