- 您现在的位置：买卖IC网 > PDF目录98210 > TEA2260 (STMICROELECTRONICS) 2.5 A SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDIP16 PDF资料下载
参数资料
| 型号： | TEA2260 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 2.5 A SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDIP16 |
| 封装： | BATWING, PLASTIC, DIP-16 |
| 文件页数： | 9/11页 |
| 文件大小： | 127K |
| 代理商： | TEA2260 |
Obsolete
Product(s)
- Obsolete
Product(s)
TEA2261/0
7/11
The magnetization state of the transformer is
checked by sensing the voltage across a winding
of the transformer (generally the same which sup-
plies the TEA2261). This is made by connecting a
resistor between this winding and the demagneti-
zation sensing input of the circuit (Pin 1).
SECURITY FUNCTIONS OF THE TEA2260 (see flowchart below)
Undervoltage Detection. This protection works in
association with the starting device “VCC switch”
(see paragraph Starting-mode - stand-by mode). If
VCC is lower than VCCstop (typically 7.4V) output
pulses are inhibited, in order to avoid wrong oper-
ation of the power supply or bad power transistor
drive.
Overvoltage Detection. If VCC exceeds VCCmax
(typically 15.7V) output pulses are inhibited. Re-
starting of the power supply is obtained by reduc-
ing VCC below VCCstop.
Current Limitation of the Power Transistor. The
current is measured by a shunt resistor. A double
threshold system is used:
– When the first threshold (VIM1) is reached, the
conduction of the power transistor is stopped un-
til the end of the period: a new conduction signal
is needed to obtain conduction again.
– Furthermore as long as the first threshold is
reached (it means during several periods), an ex-
ternal capacitor C2 is charged. When the voltage
across the capacitor reaches VC2 (typically
2.55V) the output is inhibited. This is called the
“repetitive overload protection”. If the overload
disappears before VC2 is reached, C2 is dis-
charged, so transient overloads are tolerated.
– Second current limitation threshold (VIM2). When
this threshold is reached the output of the circuit
is immediately inhibited. This protection is helpful
in case of hard overload for example to avoid the
magnetization of the transformer.
Restart of the Power Supply. After stopping due
to VC2, VIM2, VCCMax or VCCstop triggering, re-
start of the power supply can be obtained by the
normal operating of the “VCC switch” but thanks to
an integrated counter, if normal restart cannot be
obtained after three trials, the circuit is definitively
stopped. In this case it is necessary to reduce VCC
below approximately 5V to reset the circuit. From a
practical point of view, it means that the power
supply has to be temporarily disconnected from
any power source to get the restart.
相关PDF资料 |
PDF描述 |
|---|---|
| TEA3718DP | STEPPER MOTOR CONTROLLER, 1.5 A, PDIP16 |
| TEA3718SP | STEPPER MOTOR CONTROLLER, 1.5 A, PZFM15 |
| TEA5040S | SPECIALTY CONSUMER CIRCUIT, PDIP42 |
| TEA5040 | SPECIALTY CONSUMER CIRCUIT, PDIP40 |
| TEA5551TD | AM, AUDIO SINGLE CHIP RECEIVER, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TEA2261 | 功能描述:视频 IC SMPS Controller RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TEA2261_03 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:SWITCH MODE POWER SUPPLY CONTROLLER |
| TEA2262 | 功能描述:电流型 PWM 控制器 SMPS Controller 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 |
| TEA2R2M1CTR-0512P | 功能描述:铝质电解电容器 - 带引线 16V 2.2uF 20% RoHS:否 制造商:Kemet 引线类型: 电容:220 uF 容差:20 % 电压额定值:25 V 工作温度范围: 端接类型:Radial 外壳直径:8 mm 外壳长度:11 mm 引线间隔:5 mm 产品:General Purpose Electrolytic Capacitors 封装:Bulk |
| TEA2R2M1HBK-0512P | 功能描述:铝质电解电容器 - 带引线 50V 2.2uF 20% RoHS:否 制造商:Kemet 引线类型: 电容:220 uF 容差:20 % 电压额定值:25 V 工作温度范围: 端接类型:Radial 外壳直径:8 mm 外壳长度:11 mm 引线间隔:5 mm 产品:General Purpose Electrolytic Capacitors 封装:Bulk |
发布紧急采购，3分钟左右您将得到回复。