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RT9237 Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers

Part # RT9237
Description  MULTI-PHASE DC/DC CONTROLLER FOR CPU CORE POWER SUPPLY
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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RT9237 Datasheet(HTML) 10 Page - List of Unclassifed Manufacturers

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RT9237
Preliminary
www.richtek-ic.com.tw
DS9237-00 January 2002
10
3-Phase Converter and Components Function Grouping
Design Procedure Suggestion
Voltage Loop setting
a. Output filter pole and zero (Inductor, output
capacitor value & ESR)
b. Error amplifier compensation & saw-tooth wave
amplitude(compensation network & IRMP pin
resistor)
Current loop setting
a. GM amplifier S/H current(current sense
component Ron, ISPx & ISNx pin external resistor
value, keep ISPx current < 50uA at full load
condition)
b. Over current protection trip point(IMAX pin
resistor, keep ISPx current<80uA at OCP
condition)
VRM load line setting
a. Droop amplitude (ADJ pin resistor)
b. No load offset(additional resistor in compensation
network)
Power sequence & SS
DVD pin external resistor and SS pin capacitor
PCB layout
a. Kelvin sense for current sense GM amplifier
input
b. Refer to layout guide for other item
COMP
FB
ADJ
GND
VSEN
IMAX
DVD
IRMP
SS
ISN3
ISN2
ISN1
PWM3
ISP3
ISP2
PWM2
PWM1
ISP1
VDD
RT9237
+5V
12V
VID
12V
PWM
PVCC
VCC
BOOT
UGATE
PHASE
LGATE
GND
RT9600
12V
+VCORE
PWM
PVCC
VCC
BOOT
UGATE
PHASE
LGATE
GND
RT9600
12V
PWM
PVCC
VCC
BOOT
UGATE
PHASE
LGATE
GND
RT9600
Compensation
& Offset
Droop Setting
Driver Power
UVLO
Ramp Setting
OCP Setting
Current Sense
Components


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