rt9237 ETC-unknow, rt9237 Datasheet - Page 10

• Manufacturer Part Number: rt9237
• Description: Multi-phase Dc/dc Controller Core Power Supply
• Manufacturer: ETC-unknow

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