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| 型号： | TEA1733P/N1,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 5/21页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR SMPS GREEN OVP 8-DIP |
| 标准包装： | 50 |
| 系列： | GreenChip™ |
| 输出隔离： | 隔离 |
| 频率范围： | 62kHz ~ 71kHz |
| 输入电压： | 12 V ~ 30 V |
| 输出电压： | 9 V ~ 12 V |
| 功率（瓦特）： | 500mW |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-DIP |
| 包装： | 管件 |
| 相关产品： | 732-2243-ND - TRANS FLYBACK NXP TEA1733 4.0MH 732-2242-ND - TRANS FLYBACK NXP TEA1733 2.2MH |
NXP Semiconductors
TEA1733P
GreenChip SMPS control IC
7. Functional description
7.1 General control
The TEA1733P contains a flyback circuit controller, a typical configuration of which is
C1
R1
C2
TEA1733P
R3
Θ
R2
R4
VINSENSE
PROTECT
CTRL
5
6
7
4
3
2
ISENSE
DRIVER
GND
R5
R10
S1
Z1
C3
OPTIMER
8
1
VCC
R6
C4
R8
C5
C6
R9
R7
014aab131
Fig 3.
Typical configuration
7.2 Start-up and UnderVoltage LockOut (UVLO)
Initially, the capacitor on the VCC pin is charged from the high voltage mains via resistor
R3.
If V CC is lower than V startup , the IC current consumption is low (typically 10 ? A). When V CC
reaches V startup , the IC first waits for the VINSENSE pin to reach the V start(VINSENSE)
voltage and PROTECT pin to reach the V det(L)(PROTECT) voltage. When both levels are
reached, the IC charges the ISENSE pin to the V start(soft) level and starts switching. In a
typical application, the supply voltage is taken over by the auxiliary winding of the
transformer.
If a protection is triggered the controller stops switching. Depending on the protection
triggered, the protection causes a restart or latches the converter to an off-state.
A restart caused by a protection rapidly charges the OPTIMER pin to 4.5 V (typical). The
TEA1733P enters Power-down mode until the OPTIMER pin discharges down to 1.2 V
(typical). In Power-down mode, the IC consumes a very low supply current (10 ? A typical)
and the VCC pin is clamped at 22 V (typical) by an internal clamp circuit. When the
voltage on pin OPTIMER drops below 1.2 V (typical) and the VCC pin voltage is above the
VCC start-up voltage (See Figure 4 ), the IC restarts.
When a latched protection is triggered, the TEA1733P immediately enters Power-down
mode. The VCC pin is clamped to a voltage just above the latch protection reset voltage
(V rst(latch) + 1 V).
TEA1733P
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 7 — 15 July 2013
? NXP B.V. 2013. All rights reserved.
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相关代理商/技术参数 |
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|---|---|
| TEA1733T | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:GreenChip SMPS control IC |
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| TEA1733T/N1 | 制造商:NXP Semiconductors 功能描述:IC AC-DC FLYBACK CNTRL SO8 制造商:NXP Semiconductors 功能描述:IC, AC-DC, FLYBACK, CNTRL, SO8 制造商:NXP Semiconductors 功能描述:IC, AC-DC, FLYBACK, CNTRL, SO8; Input Voltage:20V; Output Current:500A; Supply Voltage Min:18.6V; Supply Voltage Max:22.6V; Voltage Regulator Case Style:SOIC; No. of Pins:8; No. of Outputs:1; Operating Temperature Min:-40C; ;RoHS Compliant: Yes |
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