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XCL205/XCL206/XCL207
Series
■ BLOCK DIAGRAM
● XCL205 / XCL206 / XCL207 series A Type
L2
Phase
Compensation
Inductor
Current Feedback
L1
V OUT
R2
CFB
Error Amp.
PWM
Comparator
Current Limit
R1
FB
Logic
Synch
Buffer
Drive
Lx
V IN
Vref with
Soft Start,
CE
VSHORT
PWM/PFM
Selector
V SS
UVLO Cmp
Ramp Wave
Generator
OSC
V SS
R3
UVLO
R4
CE/MODE
Control
Logic
CE/MODE
NOTE: The XCL205 offers a fixed PWM control, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to "L" level inside.
The XCL206 control scheme is PWM/PFM automatic switching, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to
"H" level inside.
The diodes placed inside are ESD protection diodes and parasitic diodes.
● XCL205 / XCL206 / XCL207 / XCL205 / XCL206 / XCL207 series B/C/G Type
L2
Phase
Compensation
Inductor
Current Feedback
L1
V OUT
R2
CFB
Error Amp.
PWM
Comparator
Current Limit
R1
FB
Logic
Synch
Buffer
Drive
Lx
V IN
Vref with
Soft Start,
CE
VSHORT
PWM/PFM
Selector
V SS
UVLO Cmp
Ramp Wave
Generator
OSC
CE/
V SS
R3
UVLO
R4
CE/MODE
Control
Logic
CE/MODE
NOTE: The XCL205 offers a fixed PWM control, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to "L" level inside.
The XCL206 control scheme is PWM/PFM automatic switching, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to
"H" level inside.
The diodes placed inside are ESD protection diodes and parasitic diodes.
■ ABSOLUTE MAXIMUM RATINGS
Ta = 25 ℃
PARAMETER
V IN Pin Voltage
L X Pin Voltage
V OUT Pin Voltage
CE/MODE Pin Voltage
L X Pin Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
SYMBOL
V IN
VL X
V OUT
V CE
IL X
Pd
Topr
Tstg
RATINGS
V SS - 0.3 ~V SS +6.5
V SS - 0.3 ~ V IN + 0.3 ≦ V SS +6.5
V SS - 0.3 ~V SS +6.5
V SS - 0.3 ~V SS +6.5
± 1500
1000 *1
- 40 ~ + 85
- 40 ~ + 105
UNITS
V
V
V
V
mA
mW
℃
℃
*1: The power dissipation figure shown is PCB mounted (40mm × 40mm, t=1.6mm, Glass Epoxy FR-4).
Please refer to page 16 for details.
3/25
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