XRP7708_12 Datasheet, PDF (5/28 Pages) Exar Corporation – Quad Channel Digital PWM Step Down Controllers

BLOCK DIAGRAM
VOUT1
PreScaler
Vtar
DAC
VOUT2
PreScaler
Vtar
DAC
XRP7708 and XRP7740
Quad Channel Digital PWM Step Down Controllers
Feedback
ADC
Channel 1
Digital
PID
Hybrid
DPWM
Delay
Gate
Driver
SS & PD
Current
ADC 1
2-CH
MUX
Feedback
ADC
Channel 2
Digital
PID
–
Hybrid
DPWM
SS & PD
6
Dead
Time
Gate
Driver
BST1
GH1
LX1
GL1
PGND1
BST2
GH2
LX2
GL2
PGND2
VOUT3
VOUT4
VCC
VDD
GPIO 0-3
SDA,SCL
LDO
GPIO
I2C
© 2012 Exar Corporation
Channel 3
Current
ADC 2
2-CH
MUX
VCCD
Channel 4
VREF
OSC
OTP
Fault
Handling
CLOCK
PWR
Good
AUX ADC
UVLO
Configuration
Registers
7-CH
MUX
Vout1
Vout2
Vout3
Vout4
Vtj
VIN2
VIN1
STBY LR
LDOOUT
Fig. 2: XRP7708 and XRP7740 Block Diagram
5/28
Rev. 1.2.2