参数资料
| 型号： | TEA1752LT/N1,518 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 11/34页 |
| 文件大小： | 0K |
| 描述： | IC CTLR SMPS SW MODE 16SOIC |
| 标准包装： | 1 |
| 输出隔离： | 隔离 |
| 输入电压： | 14 V ~ 38 V |
| 功率（瓦特）： | 600mW |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SO |
| 包装： | 标准包装 |
| 其它名称： | 568-5962-6 |
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NXP Semiconductors
S1
TEA1752T; TEA1752LT
GreenChip III SMPS control IC
Istart(soft)PFC ≤ 60 μ A
SOFT START
SOFT STOP
CONTROL
RSS1
CSS1
11
PFCSENSE
0.5 V
OCP
RSENSE1
014aaa756
Fig 5.
Soft start-up of PFC
7.2.6 Low power mode
When the output power of the flyback converter (see Section 7.3 ) is low, the flyback
converter switches to frequency reduction mode. When the internal switching frequency
limit of the flyback drops below 48 kHz (typical), the power factor correction circuit is
switched off to maintain high efficiency. The switch-off can be delayed by connecting a
capacitor to the PFCTIMER pin (see Section 7.2.7 ).
During low power mode operation the PFCCOMP pin is clamped to a minimum voltage of
3.5 V (typical) and a maximum voltage of 3.7 V (typical). The lower clamp voltage limits
the maximum power delivered when the PFC is switched on again. The upper clamp
voltage ensures the PFC can return to its normal regulation point in a limited amount of
time when returning from low power mode.
The power factor correction circuit restores normal operation when the internal switching
frequency limit of the flyback converter rises above 86 kHz (typical).
7.2.7 PFC off delay (pin PFCTIMER)
When the internal switching frequency limit of the flyback controller drops below
48 kHz (typical), the PFC is switched off. To prevent the PFC from switching off due to a
fast changing load at the flyback output, the PFC switch-off can be delayed by connecting
a capacitor to the PFCTIMER pin.
When the flyback controller detects a low power, it enters frequency reduction mode and
the IC outputs a 10 μ A (typical) current to the PFCTIMER pin. When the voltage on the
PFCTIMER pin reaches 3.6 V (typical), the PFC is switched off by performing a soft stop.
When the flyback controller part leaves the frequency reduction mode, a switch
discharges the PFCTIMER pin capacitor. When the voltage on the PCTIMER pin drops
below 1.27 V (typical), the PFC is switched on (see Figure 6 ).
TEA1752T_LT
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 02 — 24 June 2010
? NXP B.V. 2010. All rights reserved.
11 of 34
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TEA1752T | 制造商:未知厂家 制造商全称:未知厂家 功能描述:The TEA1752T and TEA1752LT combine a controller for Power Factor Correction (PFC) and a flyback controller. |
| TEA1752T/1791/DB/90W,598 | 制造商:NXP Semiconductors 功能描述:- Boxed Product (Development Kits) 制造商:NXP Semiconductors 功能描述:90W notebook adapter Ref |
| TEA1752T/N1,518 | 功能描述:DC/DC 开关控制器 IC CTLR SMPS SW MODE RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TEA1753 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:The GreenChip III is the third generation of green Switched Mode Power Supply (SMPS) controller ICs. |
| TEA1753LT/N1,518 | 功能描述:DC/DC 开关控制器 GreenChip III SMPS control IC RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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