- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373740 > TSM006IDT (意法半導體) Primary PWM Controller PDF資料下載
參數(shù)資料
| 型號： | TSM006IDT |
| 廠商： | 意法半導體 |
| 英文描述： | Primary PWM Controller |
| 中文描述： | 小學PWM控制器 |
| 文件頁數(shù)： | 7/13頁 |
| 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
V
BL1
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
V
BL2
, 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 V
BL
, device enters burst
mode, PWM is stopped while Comp voltage is
lower than V
BL
. 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 V
BL
, PWM operation can resume for some
cycles, so current in burst mode is limited to
(V
BL
-
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.
相關PDF資料 |
PDF描述 |
|---|---|
| TSM100 | SINGLE OPERATIONAL AMPLIFIER AND SINGLE COMPARATOR |
| TSM100I | SINGLE OPERATIONAL AMPLIFIER AND SINGLE COMPARATOR |
| TSM100ID | SINGLE OPERATIONAL AMPLIFIER AND SINGLE COMPARATOR |
| TSM1011 | Constant Voltage and Constant Current Controller for Battery Chargers and Adapters |
| TSM1011AID | Constant Voltage and Constant Current Controller for Battery Chargers and Adapters |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TSM007 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Primary PWM Controller |
| TSM007ID | 功能描述:IC REG CTRLR ISO PWM CM 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| TSM007IDT | 功能描述:電流型 PWM 控制器 Primary Standard RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| TSM007IN | 功能描述:電流型 PWM 控制器 Primary Standard RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| TSM-008-20 | 制造商:Power Dynamics Inc 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。