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AP3202 데이터시트(PDF) 2 Page - BCD Semiconductor Manufacturing Limited

부품명 AP3202
부품 상세설명  380kHz, 2A Asynchronous DC-DC Buck Converter
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제조업체  BCDSEMI [BCD Semiconductor Manufacturing Limited]
홈페이지  http://www.bcdsemi.com
Logo BCDSEMI - BCD Semiconductor Manufacturing Limited

AP3202 데이터시트(HTML) 2 Page - BCD Semiconductor Manufacturing Limited

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Preliminary Datasheet
380kHz, 2A Asynchronous DC-DC Buck Converter
AP3202
Mar. 2011 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
2
Pin Configuration
M Package
(SOIC-8)
Figure 2. Pin Configuration of AP3202 (Top View)
Pin Description
Pin Number
Pin Name
Function
1
BS
Bootstrap pin. A bootstrap capacitor is connected between the BS pin
and SW pin. The voltage across the bootstrap capacitor drives the
internal high-side power MOSFET
2
IN
Supply input pin. A capacitor should be connected between the IN pin
and GND pin to keep the input voltage constant
3
SW
Power switch output pin. This pin is connected to the inductor and
bootstrap capacitor
4
GND
Ground pin
5
FB
Feedback pin. This pin is connected to an external resistor divider to
program the system output voltage. When the FB pin voltage exceeds
20% of the nominal regulation value of 1.222V, the over voltage
protection is triggered. When the FB pin voltage is below 0.6V, the
oscillator frequency is lowered to realize short circuit protection
6
COMP
Compensation pin. This pin is the output of the transconductance
error amplifier and the input to the current comparator. It is used to
compensate the control loop. Connect a series RC network from this
pin to GND. In some cases, an additional capacitor from this pin to
GND pin is required
7
EN
Control input pin. Forcing this pin above 1.5V or set this pin floating
enables the IC. Forcing this pin below 0.5V shuts down the IC. When
the IC is in shutdown mode, all functions are disabled to decrease the
supply current below 1
µA
8
NC
No Connection


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