参数资料
型号: SI9114ADY-T1-E3
厂商: Vishay Siliconix
文件页数: 1/8页
文件大小: 0K
描述: IC REG CTRLR FLYBK ISO CM 14SOIC
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 2MHz
占空比: 50%
电源电压: 9.5 V ~ 16.5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
包装: 带卷 (TR)
Product is End of Life 3/2014
Si9114A
Vishay Siliconix
High-Frequency Switchmode Controller
DESCRIPTION
FEATURES
The Si9114A is a BiC/DMOS current-mode pulse width
modulation (PWM) controller IC for high-frequency dc-to-dc
converters. Single-ended topologies (forward and flyback) can
be implemented at frequencies up to 1 MHz. The oscillator has
an internal divide-by-two that limits the duty ratio to 50 %. An
oscillator sync output allows converters to be synchronized in
phase as well as in frequency, in a master/slave configuration.
The output inverter can typically source 500 mA and sink
700 mA. Shoot-through current is all but eliminated to
minimize supply current requirements.
The high-voltage DMOS transistor allows the IC to interface
directly to bus voltages up to 200 V. Other features include a
1.5 % accurate voltage reference, 1.8 MHz (min.) bandwidth
error amplifier, shutdown logic control, soft-start and
undervoltage lockout circuits.
The Si9114A is available in both standard and lead (Pb)-free
14-pin plastic DIP and SOIC packages, and is specified over
the industrial, D suffix (- 40 °C to 85 °C) temperature range.
FUNCTIONAL BLOCK DIAGRAM
CURRENT
?
?
?
?
?
?
15 V to 200 V Input Range
Current-Mode Control
Internal Start-Up Circuit
Latched SHUTDOWN
Soft-Start
1.8 MHz Error Ampere15 V to 200 V Input Range
FB
COMPENSATION
SENSE
SYNC
R OSC
C OSC
5
Error
Amplifier
6 13
10
B2
OSC
Out
8
OSC
9
4
-
NI
+
2V
Enable
V REF
3
Ref
Gen
+
-
-
+
R
Q
S
4.6 V
20 μA
+
-
12 DRIVER
OUTPUT
SS
7
- V IN
1.25 V
Substrate
V CC
11
- V IN
20 μA
V CC
+V IN
14
1
-
+
-
+
0.2 V
9.2 V
-
+
Undervoltage
Lockout
Q
S
R
2
SHUTDOWN
Document Number: 70025
S-42044-Rev. E, 15-Nov-04
www.vishay.com
1
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