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ISL97656 датащи(PDF) 3 Page - Intersil Corporation

номер детали ISL97656
подробное описание детали  Integrated 4A Switch PWM Step-Up Regulator
PDF  8 Pages
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производитель  INTERSIL [Intersil Corporation]
домашняя страница  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL97656 датащи(HTML) 3 Page - Intersil Corporation

  ISL97656 Datasheet HTML 1Page - Intersil Corporation ISL97656 Datasheet HTML 2Page - Intersil Corporation ISL97656 Datasheet HTML 3Page - Intersil Corporation ISL97656 Datasheet HTML 4Page - Intersil Corporation ISL97656 Datasheet HTML 5Page - Intersil Corporation ISL97656 Datasheet HTML 6Page - Intersil Corporation ISL97656 Datasheet HTML 7Page - Intersil Corporation ISL97656 Datasheet HTML 8Page - Intersil Corporation  
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3
FN6439.4
April 2, 2010
Block Diagram
Typical Application Circuit
COMPARATOR
OSCILLATOR
SHUTDOWN
AND START-UP
CONTROL
LX
IN
FREQ
EN
SS
REFERENCE
GENERATOR
PWM LOGIC
CONTROLLER
FET
DRIVER
CURRENT
SENSE
GM
AMPLIFIER
GND
FB
COMP
Pin Descriptions
PIN NUMBER
PIN NAME
DESCRIPTION
1
COMP
Compensation pin. Output of the internal error amplifier. Capacitor and resistor from COMP pin to ground.
2
FB
Voltage feedback pin. Internal reference is 1.24V nominal. Connect a resistor divider from VOUT.
VOUT = 1.24V (1 + R1/R2). See “Typical Application Circuit”.
3
EN
Shutdown control pin. Pull EN low to turn off the device.
4, 5
GND
Analog and power ground.
6, 7
LX
Power switch pin. Connected to the drain of the internal power MOSFET.
8
IN
Analog power supply input pin.
9
FREQ
Frequency select pin. When FREQ is set low, switching frequency is set to 620kHz. When connected to
high or IN, switching frequency is set to 1.25MHz.
10
SS
Soft-start control pin. Connect a capacitor to control the converter start-up.
1
2
3
4
10
9
8
7
COMP
FB
EN
GND
SS
FREQ
IN
LX
+
+
3.9k
Ω
4.7nF
27nF
22µF
C3
C1
0.1µF
10µH
D1
22µF
C2
12V
2.3V TO 6.0V
R3
C5
86.6k
Ω
R1
10k
Ω
R2
C4
5 GND
6
LX
ISL97656



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