rt9244 Richtek Technology Corporation, rt9244 Datasheet - Page 11

• Manufacturer Part Number: rt9244
• Description: Multi-phase Controller Core Power Supply
• Manufacturer: Richtek Technology Corporation

3-Phase Converter and Components Function Grouping
Design Procedure Suggestion
Voltage Loop Setting
Current Loop Setting
DS9244-06 March 2007
a. Output filter pole and zero (Inductor, output capacitor
b. Error amplifier compensation & sawtooth wave amp-
c. Kelvin sense for V
a. GM amplifier S/H current (current sense component
b. Over-current protection trip point (Internal setting,
value & ESR).
litude (compensation network).
Ron, ISPx & ISNx pin external resistor value, keep
ISPx current < 60μA at full load condition for better
keep ISPx current < 100μA at OCP condition for
load line linearity).
precision issue).
Voltage Setting
Compensation
Droop Setting
DAC Offset
Driver Power
& Offset
Frequency
UVLO
Setting
12V
CORE
PGOOD
.
OVP
VID
FB
ADJ
DVD
VOSS
SS,SS2
RT
SGND
VSEN
VDIF
COMP
RT9244
GND
PWM2
PWM3
PWM1
ISP2
ISN2
ISP3
ISN3
ISP1
ISN1
VRM Load Line Setting
Power Sequence & SS
PCB Layout
DVD pin external resistor and SS pin capacitor.
a. Droop amplitude (ADJ pin resistor).
b. No load offset (additional resistor in compensation
c. DAC offset voltage setting (VOSS pin & compen-
a. Kelvin sense for current sense GM amplifier input.
b. Refer to layout guide for other item.
PVCC
PWM
PVCC
PWM
PVCC
PWM
VCC
VCC
VCC
network).
sation network resistor).
RT9600
RT9600
RT9600
GND
GND
GND
UGATE
PHASE
UGATE
UGATE
LGATE
PHASE
PHASE
LGATE
LGATE
BOOT
BOOT
BOOT
12V
12V
12V
Current Sense
Components
RT9244
www.richtek.com
V
CORE
11