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BD7692FJ-E2 데이터 시트보기 (PDF) - ROHM Semiconductor

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BD7692FJ-E2
ROHM
ROHM Semiconductor ROHM
BD7692FJ-E2 Datasheet PDF : 26 Pages
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BD7692FJ
Description of Blocks
1 VCC Protection
This IC has VCC UVLO (Under Voltage Lock Out) of the VCC pin. Switching stops at the time of VCC voltage drop.
2 Power Factor Correction
The power factor improvement circuit is a voltage control method of Boundary Conduction Mode.
The outline operation circuit diagram is shown in Figure 1. The switching operation is shown in Figure 2.
Switching Operation
1. MOSFET is turned on, and IL increases.
2. The IC compares VEO with VRAMP slope decided in RT pin, and MOSFET is off when the VRAMP voltage higher than VEO.
3. MOSFET is off, and IL decreases.
4. The IS pin detects a zero point of the IL and turns on MOSFET.
ACIN
Diode
Bridge
IL
VDS
COIL
PFC OUT
OUT
VS
IS
EO
GND
RIS
MOSFET
Zero current and
OCP detection
Figure 1. Operation Circuit Outline
OUT
(Gate)
MOSFET
(VDS)
I L IL
VEO
VRAMP
(Internal)
VZCD
1
2
3
4
Figure 2. Switching Operation Timing Chart
PFC OUT
Feedback Resistance
GND
www.rohm.com.
© 2018 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
3/22
TSZ02201-0F2F0A200320-1-2
04.Oct.2018 Rev.001

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