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參數(shù)資料
| 型號： | AP1086K25A |
| 英文描述： | 1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator |
| 中文描述： | 1.5A的低壓差正可調或固定模式穩(wěn)壓器 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大小： | 92K |
| 代理商： | AP1086K25A |
www.fairchildsemi.com
REV. 1.0.3 6/21/01
Features
Full bridge phase modulation zero voltage switching
circuit with programmable ZV transition times
Constant frequency operation to 500kHz
Current mode operation
Cycle-by-cycle current limiting with integrating fault
detection and restart delay
Precision buffered 5V reference (+1%)
Four 1.5A peak current totem-pole output drivers
Under-voltage lockout circuit with 6V hysteresis
Power DIP package
General Description
The ML4818 is a complete phase modulation control IC suit-
able for full bridge soft switching converters. Unlike conven-
tional PWM circuits, the phase modulation technique allows
for zero-voltage switching 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 ML4818 can be operated in current mode. The delay
times for the outputs are externally programmable to allow
the zero-voltage switching transitions to take place.
Pulse-by-pulse current limit, integrating fault detection, and
soft start reset are provided. The under-voltage lockout cir-
cuit features a 6V hysteresis with a low starting current to
allow off-line start up with a low power bleed resistor. A
shutdown function powers down the IC, putting it into a low
quiescent state.
Block Diagram
10
13
11
2
3
5
8
9
12
4
24
20
16
17
22
21
14
*
I
LIM
RC
RESET
SOFT START
INV
E/A OUT
C
T
RAMP
R
T
CLOCK
SHUTDOWN
V
REF
V
CC
A2 OUT
A1 OUT
B1 OUT
B2 OUT
R
DELAY
GND
REFERENCE
AND
UNDER-VOLTAGE
LOCKOUT
–
+
T FLIP
FLOP
T
Q
Q
S
Q
R
OSC
Q
+
Φ
MOD
–
EAMP
+
V+
I
1
+5V
3V
Q
R
S
+
–
1V
DELAY
V
CC
DELAY
V
CC
DELAY
V
CC
DELAY
INHIBIT
OUTPUTS
*PINS 1, 6, 7, 15, 18, 19 AND 23 ARE GND
0.7V
I
2
+
R
S
ML4818
Phase Modulation/S oft S witc hing Controller
相關PDF資料 |
PDF描述 |
|---|---|
| ML4818 | Phase Modulation/Soft Switching Controller |
| ML4818CP | Phase Modulation/Soft Switching Controller |
| AP1119Y12A | 0.5A Positive Low Dropout Fixed-Mode Regulator With EN Function |
| AP1119 | 0.5A Positive Low Dropout Fixed-Mode Regulator With EN Function |
| AP1119Y12 | 0.5A Positive Low Dropout Fixed-Mode Regulator With EN Function |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AP1086K25G-13 | 功能描述:低壓差穩(wěn)壓器 - LDO 3-TERM ADJ OR FIXED 1.4V LDO 3.3V LOGIC RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| AP1086K25G-U | 制造商:DIODES 制造商全稱:Diodes Incorporated 功能描述:1.5A LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR |
| AP1086K25L | 制造商:ANACHIP 制造商全稱:Anachip Corp 功能描述:1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator |
| AP1086K25L-13 | 功能描述:低壓差穩(wěn)壓器 - LDO LDO BI 1.5A 1.4V 12V 1.25V 2.5V FIX RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| AP1086K25LA | 制造商:ANACHIP 制造商全稱:Anachip Corp 功能描述:1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator |
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