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GM38C42S8R Datasheet(PDF) 8 Page - Gamma Microelectronics Inc.

Part # GM38C42S8R
Description  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
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Manufacturer  GAMMA [Gamma Microelectronics Inc.]
Direct Link  http://www.gammamicro.com.tw/
Logo GAMMA - Gamma Microelectronics Inc.

GM38C42S8R Datasheet(HTML) 8 Page - Gamma Microelectronics Inc.

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8
V
IN
26V to 40V
R2
68k
D2
M17Z105
1/4W
0.22µF
6.8k
100k
R4
18
GM38C42
1
2
3
4
8
7
6
5
C7
200pF
R5
16k
0.1µF
COMP
FB
I
SNS
R/C
TT
V
REF
V
DD
OUT
GND
CT1
0.1µF*
MKS2
C5
4.7µF
Q1
IRF820
D4
1N765B
T1
C8
0.1µF
R1
10
1/2W
C2
1000pF
D5
1N4001
6.19k
1%
1.62k
1%
C3
3.3µF
C4
0.1µF
V
OUT
12V, 2A
D3
MBR030
4.7W
L1 48µH
31DQ10
D1
Figure 7. 500kHz, 25W, Buck Converter
Test
Conditions
Results
Line Regulation
Load Regulation
Efficiency
Output Ripple
V = 26V to 80V, I = 2A
IN
O
V = 48V, I = 0.2A to 2A
IN
O
V = 48V, I = 2A
IN
O
V = 48V, I = 2A (20MHz BW)
IN
O
0.5%
0.6%
90%
100mV
0.1µF
+
* Locate near GM38C42 supply pins


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