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| 型号： | SIC762CD-T1-GE3 |
| 厂商： | Vishay Siliconix |
| 文件页数： | 5/18页 |
| 文件大小： | 0K |
| 描述： | IC CTLR PFC STAGE PPAK MLP66-40 |
| 标准包装： | 1 |
| 系列： | DrMOS |
| 类型： | 高端/低端驱动器 |
| 输入类型： | PWM |
| 输出数： | 1 |
| 电流 - 输出 / 通道： | 35A |
| 电源电压： | 3 V ~ 24 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | PowerPAK? MLP66-40 |
| 供应商设备封装： | PowerPAK? MLP66-40 |
| 包装： | 标准包装 |
| 其它名称： | SIC762CD-T1-GE3DKR |
SiC762CD
Vishay Siliconix
SIC762CD BLOCK DIAGRAM
V DR V
GH
V CI N
U V LO
V I N
BOOT
DSBL#
THD N
Thermal
W arning
AST C N TL
DCM DETECT
PHASE
V S W H
P W M
SMOD
C G N D
Tristate
P W M
GL
P G N D
Figure 2
DETAILED OPERATIONAL DESCRIPTION
PWM Input with Tristate Function
The PWM input receives the PWM control signal from the V R
controller IC. The PWM input is designed to be compatible
with standard controllers using two state logic (H and L) and
advanced controllers that incorporate Tristate logic (H, L and
Tristate) on the PWM output. For two state logic, the PWM
input operates as follows. When PWM is driven above
V th_pwm_r the low side is turned off and the high side is turned
on. When PWM input is driven below V th_pwm_f the high side
turns off and the Low side turns on. For Tristate logic, the
PWM input operates as above for driving the MOSFETs.
However, there is an third state that is entered into as the
PWM output of Tristate compatible controller enters its high
impedance state during shut-down. The high impedance
state of the controller's PWM output allows the SiC762CD to
pull the PWM input into the Tristate region (see the Tristate
Voltage Threshold Diagram below). If the PWM input stays in
this region for the Tristate Hold-Off Period, t TSHO , both high
side and low side MOSFETs are turned off. This function
allows the V R phase to be disabled without negative output
voltage swing caused by inductor ringing and saves a
Schottky diode clamp. The PWM and Tristate regions are
separated by hysteresis to prevent false triggering. The
SiC762CD incorporates PWM voltage thresholds that are
compatible with 5 V logic.
Disable (DSBL#)
In the low state, the DSBL# pin shuts down the driver IC and
disables both high-side and low-side MOSFET. In this state,
the standby current is minimized. If DSBL# is left
unconnected an internal pull-down resistor will pull the pin
down to C GND and shut down the IC.
Document Number: 65727
S10-0275-Rev. A, 08-Feb-10
Diode Emulation Mode (SMOD) Skip Mode
When SMOD pin is low the diode emulation mode is enabled.
This is a non-synchronous conversion mode that improves
light load efficiency by reducing switching losses. Conducted
losses that occur in synchronous buck regulators when
inductor current is negative are also reduced. Circuitry in the
gate drive IC detects when inductor current crosses zero and
automatically stops switching the low side MOSFET. See
SMOD Operation Diagram for additional details. This
function can also be used for a pre-biased output voltage. If
SMOD is left unconnected, an internal pull up resistor will pull
the pin up to V CIN (Logic High) to disable the diode emulation
function.
Thermal Shutdown Warning (THDN)
The THDN pin is an open drain signal that flags the presence
of excessive junction temperature. Connect a maximum of
20 k Ω to pull this pin up to V CIN . An internal temperature
sensor detects the junction temperature. The temperature
threshold is 150 °C. When this junction temperature is
exceeded the THDN flag is set. When the junction
temperature drops below 135 °C the device will clear the
THDN signal. The SiC762CD does not stop operation when
the flag is set. The decision to shutdown must be made by an
external thermal control function.
Voltage Input (V IN )
This is the power input to the drain of the high-side Power
MOSFET. This pin is connected to the high power
intermediate BUS rail.
Switch Node (V SWH and PHASE)
The Switch node V SWH is the circuit PWM regulated output.
This is the output applied to the filter circuit to deliver the
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SIC762DB | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Integrated DrMOS Power Stage |
| SIC769 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Integrated DrMOS Power Stage |
| SIC769ACD | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Integrated DrMOS Power Stage |
| SIC769ACD-T1-GE3 | 功能描述:开关变换器、稳压器与控制器 35A 3 - 6V BUILT-IN PWM CONT 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 |
| SIC769ADB | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Integrated DrMOS Power Stage |
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