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Part Name
Description
MC34717(2007) View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
Manufacturer
MC34717
(Rev.:2007)
5.0 A 1.0 MHz Fully Integrated Dual Switch-Mode Power Supply
Freescale Semiconductor
MC34717 Datasheet PDF : 25 Pages
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INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
PG
FREQ
ILIM1
BOOT1
PVIN1
SW1
PGND1
COMP1
INV1
VOUT1
SD
System
M1
Reset
Oscillator
Buck
Control
F
SW
Logic
I
SENSE2
I
SENSE1
I
LIM2
Current
Monitoring
I
LIM1
System
Control
Thermal
Monitoring
V
BG
Bandgap
Regulator
Discharge
Internal
Voltage
Regulator
M2
V
IN
M4
Gate
I
SENSE
Driver
F
SW
M5
Error
Amplifier
PWM
Comparator
Ramp
Generator
V
BG
M8
Discharge
M3
V
IN
M6
F
SW
Gate
Driver
I
SENSE
M7
PWM
Comparator
Ramp
Generator
Error
Amplifier
Reference
Selection
V
BG
M9
Discharge
GND
CHANNEL 1
CHANNEL 2
VDDI
VIN
ILIM2
BOOT2
PVIN2
SW2
PGND2
COMP2
INV2
VOUT2
VREFIN
Figure 2. 34717 Simplified Internal Block Diagram
34717
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
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