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| 型号： | TEA1751T/N1,518 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 25/29页 |
| 文件大小： | 253K |
| 描述： | IC CTRLR GREENCHIP SMPS 16-SOIC |
| 标准包装： | 2,500 |
| 系列： | GreenChip™ III |
| 模式： | 连续导电（CCM） |
| 频率 - 开关： | 125kHz |
| 电流 - 启动： | 60µA |
| 电源电压： | 0.65 V ~ 22 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SO |
| 包装： | 带卷 (TR) |
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TEA1751T_LT_2
?NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 23 December 2009
25 of 29
NXP Semiconductors
TEA1751T; TEA1751LT
GreenChip III SMPS control IC
11. Application information
A power supply with the TEA1751(L)T consists of a power factor correction circuit
followed by a flyback converter. See Figure 16
.
Capacitor C
VCC
buffers the IC supply voltage, which is powered via the high voltage
rectified mains during start-up and via the auxiliary winding of the flyback converter during
operation. Sense resistors R
SENSE1
and R
SENSE2
convert the current through the
MOSFETs S1 and S2 into a voltage at pins PFCSENSE and FBSENSE. The values of
R
SENSE1
and R
SENSE2
define the maximum primary peak current in MOSFETs S1 and S2.
In the example given, the LATCH pin is connected to a Negative Temperature Coefficient
(NTC) resistor. When the resistance drops below
(typ), the
protection is activated. A capacitor C
TIMEOUT
is connected to the FBCTRL pin. For a
120 nF capacitor, typically after 10 ms the time-out protection is activated. R
LOOP
is added
so that the time-out capacitor does not interfere with the normal regulation loop.
R
S1
and R
S2
are added to prevent the soft start capacitors from being charged during
normal operation due to negative voltage spikes across the sense resistors.
Resistor R
AUX1
is added to protect the IC from damage during lightning events.
Fig 17. Typical application diagram TEA1751(L)T
V
prot LATCH
(
)
I
O LATCH
(
)
-------------------------------
15.6 k?/SPAN>
=
12
11
9 16 13
8
6
7
3
2
10
4
1
TEA1751(L)T
014aaa302
?/DIV>
R
S2
R
SS2
C
SS2
D2
C
OUT
T2
R
AUX2
R
SENSE2
C
VCC
5
R
S1
C
bus
D1
S1
C
SS1
R
SS1
R
SENSE1
C
TIMEOUT
R
LOOP
COMPENSATION
R
AUX1
S2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TEA1752LT | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:GreenChip III SMPS control IC |
| TEA1752LT/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 |
| TEA1752LT/N1/S1518 | 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| 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 |
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