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参数资料
| 型号： | TSM006IDT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 73 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | PLASTIC, SO-14 |
| 文件页数： | 11/13页 |
| 文件大小： | 179K |
| 代理商： | TSM006IDT |
Functional Description
TSM006
7/13
Automatic burst mode
Burst mode is used during light load condition to
reduce the number of MOS switching, and thus
reducing overall power dissipation. Light load
condition is detected when COMP voltage is low.
When COMP voltage is lower than a threshold
VBL1 set by the external BL pin, the device output
is forced to off state, providing minimum duty
cycle and pulse skipping.
The burst status is available on the BS pin to put
other devices in standby mode when in light load
condition.
When COMP voltage (Vcomp) is higher than
VBL2, the device operates in normal mode.
Current is limited to (Vcomp-2*Vbe)/3 / Rshunt
(Rshunt is the shunt resistor used to measure the
primary current, Vbe is the forward voltage of a
diode, and 3 is the R/2R network attenuation).
Maximum current is 1V/Rshunt. When Vcomp
becomes lower than VBL, device enters burst
mode, PWM is stopped while Comp voltage is
lower than VBL. As PWM is stopped, no more
energy is transferred to the secondary side,
output voltage is decreasing, and Vcomp (which is
an image of the error comparator) tends to
increase. As soon as Vcomp becomes just higher
than VBL, PWM operation can resume for some
cycles, so current in burst mode is limited to (VBL-
2*Vbe)/3 / Rshunt.
OverCurrent detection and Hiccup mode
Overcurrent is detected when voltage at the CS
pin is greater than Vz2=1.2V. To avoid false
triggering, the overcurrent detection is delayed in
the same way than the normal pulse by pulse
current limitation.
When overcurrent is detected, the device enters
the
hiccup
mode.
Output
is
switched
off
immediately and the soft start capacitor is
discharged slowly. When the SS pin voltage goes
below 0.5V, normal soft start is started. If the
overcurrent is no more present, device operation
is resumed normally, otherwise, overcurrent is
detected again and the cycle is repeated until the
overcurrent situation disappears.
Duty cycle of the hiccup mode is set by the ratio of
SS pin discharge and charge currents: 10% typ.
With a typical capacitor Css=100nF, soft start
delay is about 40ms and hiccup off-time is 400ms.
Latched disable function
Disable mode is entered when the DIS pin voltage
is driven above 2.5V. Disable state is latched and
can only be exit by driving the Vin power supply
voltage under the UVLO level.
Thermal shutdown
The device operation is shut down when the
internal temperature exceed 130°C. Hysteresis
provides stable working and shutdown states.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSM007 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Primary PWM Controller |
| TSM007ID | 功能描述:IC REG CTRLR ISO PWM CM 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| TSM007IDT | 功能描述:电流型 PWM 控制器 Primary Standard RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| TSM007IN | 功能描述:电流型 PWM 控制器 Primary Standard RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| TSM-008-20 | 制造商:Power Dynamics Inc 功能描述: |
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