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参数资料
| 型号： | TEA1654T,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC CTLR SMPS SW MODE 14SOIC |
| 标准包装： | 2,500 |
| 系列： | GreenChip™ II |
| 输出隔离： | 隔离 |
| 频率范围： | 24kHz ~ 63kHz |
| 输入电压： | 8.7 V ~ 20 V |
| 输出电压： | 650V |
| 功率（瓦特）： | 750mW |
| 工作温度： | -20°C ~ 145°C |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SO |
| 包装： | 带卷 (TR) |
Philips Semiconductors
GreenChip ? II SMPS control IC
LOCK input
Pin LOCK is a general purpose (high-impedance) input
pin, which can be used to switch off the IC. As soon as the
voltage on this pin is raised above 2.5 V, switching will stop
immediately. The voltage on the V CC pin will cycle between
V CC(start) and V CC(UVLO) , but the IC will not start switching
Product speci?cation
TEA1654
Since the soft start current I SS is subtracted from pin V CC
charging current, the R SS value will affect the V CC charging
current level by a maximum of 60 μ A (typical value).
again until the latch function is reset. The latch is reset as
soon as the V CC drops below 4.5 V (typical value). The
internal OVP and OTP will also trigger this latch (see
Fig.2).
handbook, halfpage
ISS
The detection level of this input is related to the V CC(5V) pin
voltage in the following way: 0.5 × V CC(5V) ± 4%.
An internal Zener diode clamp of 5.6 V will protect this pin
0.5 V
start-up
2 Isense
RSS
from excessive voltages. No internal filtering is done on
this input.
Vocp
CSS
Rsense
OverTemperature Protection (OTP)
R sense
An accurate temperature protection is provided in the
circuit. When the junction temperature exceeds the
thermal shutdown temperature, the IC will stop switching.
When V CC drops to UVLO, capacitor C VCC will be
recharged to the V start level, however the IC will not start
switching again. Subsequently, V CC will drop again to the
UVLO level, etc.
Operation only recommences when the V CC voltage drops
below a level of approximately 4.5 V (practically when the
V mains has been disconnected for a short period).
Soft start-up
To prevent transformer rattle during hiccup, the
transformer peak current is slowly increased by the soft
start function. This can be achieved by inserting a resistor
and a capacitor between pin I sense and the sense resistor
(see Fig.10). An internal current source charges the
capacitor to V = I SS × R SS , with a maximum of
approximately 0.5 V.
The start level and the time constant of the increasing
primary current level can be adjusted externally by
changing the values of R SS and C SS .
V ocp – ( I SS × R SS )
I primary(max) = -----------------------------------------------
τ = R SS × C SS
The charging current I SS will flow as long as the voltage on
pin I sense is below approximately 0.5 V. If the voltage on
pin I sense exceeds 0.5 V, the soft start current source will
start limiting the current I SS . At the V CC(start) level, the I SS
current source is completely switched off.
2003 May 12
10
MCE405
Fig.10 Soft start-up.
5 V output
Pin V CC(5V) can be used for supplying external circuitry.
The maximum output current must be limited to 1 mA.
If higher peak currents are required, an external RC
combination should limit the current drawn from this pin to
1 mA maximum.
The 5 V output voltage will be available as soon as the
start-up voltage is reached. As the high voltage supply can
not supply the 5 V pin during start-up and/or shutdown,
during latched shutdown (via pin LOCK or other latched
protection such as OVP or OTP), the voltage is switched
to zero.
Driver
The driver circuit to the gate of the power MOSFET has a
current sourcing capability of typically 170 mA and a
current sink capability of typically 700 mA. This permits
fast turn-on and turn-off of the power MOSFET for efficient
operation. A low driver source current has been chosen to
limit the ? V/ ? t at switch-on. This reduces Electro Magnetic
Interference (EMI) and also limits the current spikes
across R sense .
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TEA1655T/N1,518 | 功能描述:交流/直流开关转换器 IC CTLR SMPS SW MODE RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| TEA1656T/N1,118 | 功能描述:开关变换器、稳压器与控制器 TEA1656T/SO8/REEL13/ RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| TEA1657T/N1,518 | 功能描述:交流/直流开关转换器 IC CTLR RESONANT CONV RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| TEA1703T | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:GreenChip SMPS standby control IC |
| TEA1703T/N1 | 制造商:NXP Semiconductors 功能描述:STBY CNTRLSO8 制造商:NXP Semiconductors 功能描述:STBY CNTRL,SO8 |
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