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參數資料
| 型號： | ML4828 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | BiCMOS Phase Modulation/Soft Switching Controller(BiCMOS 相調制器/全橋軟開關控制器) |
| 中文描述： | BiCMOS工藝相位調制/軟開關控制器（BiCMOS工藝相調制器/全橋軟開關控制器） |
| 文件頁數： | 1/11頁 |
| 文件大?。?/td> | 187K |
| 代理商： | ML4828 |
May 1997
ML4828
*
BiCMOS Phase Modulation/Soft Switching Controller
1
GENERAL DESCRIPTION
The ML4828 is a complete BiCMOS phase modulation
control IC suitable for full bridge soft switching converters.
Unlike conventional PWM circuits, the phase modulation
technique allows for zero voltage switching (ZVS)
transitions and square wave drive across the transformer.
The IC modulates the phases of the two sides of the bridge
to control output power.
The ML4828 can be operated in either voltage or current
mode. Both cycle-by-cycle current limit, integrating fault
detection, and soft start reset are provided. The under-
voltage lockout circuit features a 1.5V hysteresis with a
low starting current to allow off-line start up with a bleed
resistor. A shutdown function powers down the IC, putting
it into a low quiescent state.
The circuit can be operated at frequencies up to 1MHz.
The ML4828 contains four high current CMOS outputs
which feature high slew rate with low cross conduction.
*Some Packages Are End Of Life
BLOCK DIAGRAM
FEATURES
I
5V BiCMOS for low power and high frequency
(1MHz) operation
I
Full bridge phase modulation zero voltage switching
circuit with independent programmable delay times
I
Current or voltage mode operation capability
I
Cycle-by-cycle current limiting with integrating fault
detection and restart delay
I
Can be externally synchronized
I
Four 3
CMOS output drivers
I
Under-voltage lockout circuit with 1.5V hysteresis
8
–
+
DELAY B
DRIVER
DRIVER
DRIVER
+
–
2.5V REF
11
16 A2
15 B1
13 B2
–
+
ISS
IRST
FAULT
LOGIC
Q
Q
S
R
2
R
B
17
GND
1
R
A
5
V
REF
EAO
RAMP
SS
RST
I
LIM
SDN
DRIVER
DELAY A
A1
18
Φ
MOD
I
LIM
12
20
S
Q
R
Q
7
1.25V
2.5V
19
UVLO
10
9
EA+
EA–
–
+
SYNC R
T
6
C
T
4
OSC
T
Q
Q
3
14
V
CC
ERROR
AMP
1V
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ML4828CP | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:BiCMOS Phase Modulation/Soft Switching Controller |
| ML4828CP UP DIE | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4828CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:BiCMOS Phase Modulation/Soft Switching Controller |
| ML4828IP | 制造商:Rochester Electronics LLC 功能描述: |
| ML4828IP-G | 制造商:Rochester Electronics LLC 功能描述: |
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