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参数资料
| 型号： | SIP11203DLP-T1-E3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 9/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR ISO PWM MLP44-16 |
| 标准包装： | 2,500 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 电源电压： | 5.5 V ~ 13 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | PowerPAK? MLP44-16 |
| 包装： | 带卷 (TR) |
SiP11203, SiP11204
Vishay Siliconix
? W hile V L is below the UVLO R threshold, the IC
“swaps” the synchronous rectifier drive paths. This
causes the high-going signal on INB to be applied
to the gate of an n-channel hold-off MOSFET,
which is in parallel with the main OUTA driver. This
MOSFET inverts the signal from INB, which causes
its drain to be pulled towards ground. This holds
OUTA low.
? During the deadtime in which neither INB nor INA is
driven high, the voltage on INA and that on INB will
be equal to the voltage on V IN . Depending upon the
exact value of V IN , this may or may not result in
both OUTA and OUTB being pulled low by their
associated inverter MOSFETs.
FUNCTIONAL BLOCK DIAGRAM
? During the next cycle of converter operation, all of
the above applies with the exception that INB is
now driven low, which will cause INA to be driven
high. This will in turn cause the hold-off MOSFET in
parallel with the main OUTB driver to conduct,
thereby holding OUTB low.
In this way, the SiP11203/SiP11204 “swap and invert”
function prevents any unwanted turn-on of the
synchronous rectifiers during start-up. Once V L
reaches 90 % of its final value, the drive path inside the
IC is no longer swapped, and the inverting hold-off
MOSFETs are disabled.
SW1
Hold-off
MOSFET
SW2
Hold-off
MOSFET
SW1 and SW2 are closed at start- u p.
SW1 and SW2 open w hen V L > U V LO R .
Figure 3. During converter startup, the synchronous MOSFET gate-driver outputs of the SiP11203/SiP11204 are reversed and inverted
to prevent spurious MOSFET switching
START-UP DRIVER OPERATION
Assuming that V IN rises with suitable rapidity to a
voltage greater than 5.5 V, the factors controlling the
rate of rise of V L are the external V L bypass capacitor
value and the pre-regulator’s current limit. This gives
the following two equations:
? The time from start-up to
CUVLO R ? (4.45 V/35 mA) x C VL , and
? The time from start-up to
UVLO R ?? (4.45 V/35 mA) x C VL .
Document Number: 73868
S11-0975–Rev. C, 16-May-11
Once V L has reached 90 % of its final value, the clamp
holding V REF at 0 V is released, allowing the voltage on
the V REF pin to rise at a rate set by the value of the
V REF capacitor. This gives the following equation :
? The time from UVLO R to V REF attaining a voltage of
1.1 V ? ? (1.1 V/410 μA) x C VREF .
These relationships are shown in Figure 4.
www.vishay.com
9
This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SIP11204DLP-T1-E3 | 功能描述:开关变换器、稳压器与控制器 Sec Sync Rect Ctrl w/Overvolt Protect RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| SIP11205 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Feed-Forward Controller with Primary MOSFET Drivers for Intermediate Bus Converters |
| SIP11205DLP-T1-E3 | 功能描述:开关变换器、稳压器与控制器 Feed-Fwd Controller with MOSFET Drivers RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| SIP11205DQP-T1-E3 | 功能描述:开关变换器、稳压器与控制器 Feed-Fwd Controller with MOSFET Drivers RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| SIP11206 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Half-Bridge Controller with Primary MOSFET Drivers for Intermediate Bus Converters |
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