INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
REG8
voltage data
Control
voltage data
Control
REG1/VG
VOUT1 (34704A)
OUT8
SW8
L
Error Amp
Error Amp
VG
Error Amp
SW1
PWM
P-skip
PWM
VG
VG
Start-Up
Ipeak-det
and blanking
SW control
BT1
BT8
FB8
VG
REG2
REG7 (34704A)
BT2D
PVIN2
voltage data
Control
voltage data
Control
OUT7
SW2D
Error Amp
DRV7
FB7
PWM
VOUT2
SW2U
Error Amp
PWM
P-skip
Amp
VG
VREF7
COMP7
BT2U
COMP2
FB2
voltage data
Control
REG6 (34704A)
REG3
VG
voltage data
Control
BT3
PVIN3
VOUT6
SW6
L
Error Amp
SW3
PWM
VG
Error Amp
BT6
VOUT3
FB3
Error Amp
PWM
P-skip
FB6
VG
REG4
BT4D
VG
PVIN4
REG5
voltage data
Control
BT5D
PVIN5
SW4D
voltage data
Control
SW5D
VOUT4
SW4U
Error Amp
VOUT5
SW5U
Error Amp
PWM
P-skip
VG
PWM
P-skip
BT4U
VG
VG
FB4
COMP4
BT5U
COMP5
FB5
VIN
ONOFF
LION
Startup Control
ADC
UVLO
Detection
VDDI
VDDI (2.5V) VDDIMON (VDDIdet)
SCL
SDA
FREQ
SS
2
Registers
I C
Thermal
Detection
To Reg 1-8
RST
Reset Driver
Sequencer
OSC/Divider
PGND (EXPAD)
VIN
AGND
Soft Start
Figure 2. 34704 Internal Block Diagram
34704
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
FREESCALE [ Freescale ]
