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參數(shù)資料
| 型號： | LT4430 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Secondary-Side Optocoupler Driver |
| 中文描述： | 二次側(cè)驅(qū)動光電耦合器 |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 2118K |
| 代理商： | LT4430 |
LT4430
10
4430f
S U
APPLICATIO
circuitry, especially since the gate drivers typically use a
supply voltage between 5V to 12V. The preregulator circuit
finds wide use in fully synchronous forward converters,
push-pull converters and full-bridge converters.
Generate a bias supply for a forward converter using similar
techniques to that of the flyback converter. Figure 3a to 3c
detail the three common bias circuits for the synchronous
W
U
U
4430 F02a
T1
N2
N1
1:N
N = N1 + N2
V
OUT
C
OUT
*OPTIONAL SEE TEXT
LT4430
V
BIAS
C1
R1*
D2
D1
V
IN
V
IN
4430 F02b
T1
1:N
V
OUT
LT4430
V
BIAS
C
OUT
C1
R1*
D2
C2
*OPTIONAL SEE TEXT
D1
R3*
R2
QBS
Z1
Figure 2a. Flyback Converter with Tapped Secondary Bias
Figure 2b. Flyback Converter with Preregulator Bias
V
IN
4430 F03a
T1
1:N
V
OUT
C
OUT
CG
*OPTIONAL SEE TEXT
L1
Q2
FG
Q1
LT4430
V
BIAS
C1
R1*
D1
4430 F03b
T1
N1
N2
1:N
N = N1 + N2
V
OUT
C
OUT
CG
*OPTIONAL SEE TEXT
L1
Q2
LT4430
V
BIAS
C1
R1*
D1
V
IN
FG
Q1
V
IN
4430 F03c
T1
1:N
V
OUT
C
OUT
LT4430
V
BIAS
C1
R1*
D1
C2
CG
*OPTIONAL SEE TEXT
L1
Q2
FG
Q1
R3*
R2
QBS
Z1
Figure 3a. Typical Single-Switch Synchronous Forward
Converter with Bias Generator
Figure 3b. Single-Switch Synchronous Forward Converter
with Tapped Secondary Bias Generator
Figure 3c. Single-Switch Synchronous Forward Converter
with Preregulator Bias Generator
single-switch forward converter. In the flyback converter
of Figure 1d, the bias supply is proportional to V
IN
and
V
OUT
. However, in the forward converter, L1’s presence
decouples the bias supply from V
OUT
. In Figure 3a, the
bias supply equals (V
IN
N – V
F
). In Figure 3b, the bias
supply equals (V
IN
N1/N – V
F
). In Figure 3c, the bias
supply equals (V
Z1
– V
F
).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT4430_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Secondary-Side Opto-Coupler Driver Ground-Referenced Opto-Coupler Drive |
| LT4430ES6 | 制造商:Linear Technology 功能描述: |
| LT4430ES6#PBF | 制造商:Linear Technology 功能描述:Secondary Side Optocoupler Driver 6-Pin TSOT-23 制造商:Linear Technology 功能描述:OPTO-COUPLER DRIVER 20V TSOT 制造商:Linear Technology 功能描述:OPTO-COUPLER DRIVER, 20V, TSOT-23-6; IC Function:Optocoupler Driver; Supply Voltage Min:3V; Supply Voltage Max:20V; Operating Temperature Min:-40C; Operating Temperature Max:125C; Digital IC Case Style:TSOT-23; No. of Pins:6 ;RoHS Compliant: Yes |
| LT4430ES6#TR | 制造商:Linear Technology 功能描述:Secondary Side Optocoupler Driver 6-Pin TSOT-23 T/R |
| LT4430ES6#TRM | 制造商:Linear Technology 功能描述:Secondary Side Optocoupler Driver 6-Pin TSOT-23 T/R |
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