ISL97702 Intersil Corporation, ISL97702 Datasheet - Page 2

• Manufacturer Part Number: ISL97702
• Description: Boost
• Manufacturer: Intersil Corporation

Block Diagram
FB0
FB0
FB1
FB1
ISL97702
ISL97702
VDD
VDD
VDD
VDD
VDD
VDD
S1
S1
S0
S0
AND
AND
2
Synchronization
Synchronization
Signal Detector
Signal Detector
Oscillator
Oscillator
AND
AND
Voltage
Voltage
Reference
Reference
Error
Error
Amplifier
Amplifier
START
START
CLK
CLK
1
1
0
0
FIGURE 1. ISL97702 BLOCK DIAGRAM
MUX
MUX
Ccomp
Ccomp
State Machine
State Machine
(Default Sequence)
(Default Sequence)
1. Soft Inrush
1. Soft Inrush
2. VDDOUT Enable
2. VDDOUT Enable
3. Soft Boost 25
3. Soft Boost 25
4. Soft Boost 50
4. Soft Boost 50
5. Soft Boost 75
5. Soft Boost 75
6. Normal
6. Normal
Ramp-Generator
Ramp-Generator
RESTART
RESTART
Compensation
Compensation
Over-Temperature
Over-Temperature
Slope
Slope
Clamp
Clamp
Detector
Detector
ISL97702
DISABLE & WAIT
DISABLE & WAIT
As
As
Av
Av
Ai
Ai
2
2
Under-Voltage
Under-Voltage
Control Logic
Control Logic
-PWM Timing
-PWM Timing
-Current Limit
-Current Limit
-Pulse Skipping
-Pulse Skipping
Detector
Detector
EN
EN
Detector (DC)
Detector (DC)
Over-Current
Over-Current
Comparator
Comparator
Current
Current
Limit
Limit
Detector
Detector
Voltage
Voltage
Over-
Over-
Gate
Gate
Driver
Driver
Rsense
Rsense
Rsense
S2
S2
October 13, 2005
Vout
Vout
VDDout
VDDout
GND
GND
VDD
VDD
LX
LX
FN7462.0