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参数资料
| 型号： | SIP11203DLP-T1-E3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 8/18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
APPLICATIONS INFORMATION
Powering SiP11203/SiP11204
The SiP11203/SiP11204 has an internal pre-regulator
to provide 5 V at V L , which biases many of the internal
sub-circuits. This allows the IC to operate from any
input voltage within the allowable V IN range. At the
same time, V IN provides the supply voltage to the gate
driver outputs (OUTA and OUTB) directly. The gate
drive level to the synchronous rectifier MOSFETs is
determined by V IN
The V IN voltage can be derived using conventional
methods, such as an extra winding on the power
transformer or on the output inductor. Alternatively,
this supply can be derived from the pulse transformer
used to transmit synchronous rectifier timing signals
from the primary to the secondary, as shown in Figure
2 below. The voltage level on V IN will be determined by
the turn ratio of the pulse transformer and the
differential voltage between SRL of the Si9122,
Si9122A, Si9122E and SRH of of the Si9122, Si9122A,
Si9122E. Note that this circuit will cause the voltages
at INA and INB to be twice that of V IN . Therefore it may
be necessary to limit the voltage seen by INA and INB
in order to avoid exceeding their recommended
operating values.
SRH
I N A
SiP11203
SiP11204
V I N
SRL
I N B
G N D
SRH
I N A
SiP11203
SiP11204
V I N
SRL
I N B
G N D
Figure 2. Typical schematic showing how the V IN supply for SiP11203/SiP11204 is generated using the pulse transformer providing the
synchronous rectifier timing signals
START-UP DRIVER OPERATION
During start-up of the SiP11203/SiP11204, the
MOSFET drivers (OUTA and OUTB) are disabled until
V L is at 90 % of its final value. To fully prevent any
spurious turn-on of the synchronous rectifier
MOSFETs, the gates of the MOSFETs are held off
during this start up period. Until the main drivers are
enabled, the INA and INB drive paths are re-routed, or
“swapped,” inside the IC. In conjunction with a
dedicated n-channel hold-off MOSFET “inverter”
placed in parallel with each main driver, this allows the
IC to ground the appropriate synchronous rectifier gate
at the necessary time. See Figure 3.
If the first two pulses coming through the pulse
transformer are considered, the following sequence of
events follows:
www.vishay.com
8
? INA goes low, which would normally command the
OUTA driver to go low. This would prevent spurious
turn-on of the associated synchronous rectifier.
However, since the voltage to the IC is below its
normal operating level, it cannot be guaranteed that
OUTA can in fact go to its necessary state. For this
reason, the OUTA and OUTB drivers are disabled
while V L < UVLO R .
? W hen INA goes low, INB will be driven to a level of
2 x V IN . This is due to the way in which the
secondary of the pulse transformer is rectified to
provide V IN . Specifically, this results from the
rectifier diodes clamping the secondary’s negative
excursions one diode drop below ground (See
Figure 2).
Document Number: 73868
S11-0975–Rev. C, 16-May-11
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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