Datasheet > TNY265

TNY265

更新时间： 2024-02-07 15:59:22

品牌	Logo	应用领域
帕沃英蒂格盛 - POWERINT		/
页数	文件大小	规格书
22页	765K
描述
Enhanced, Energy Effi cient, Low Power Off-line Switcher

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TNY265 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Not Recommended	零件包装代码：	DIP
包装说明：	DIP,	针数：	8
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	14 weeks
风险等级：	7.65	Is Samacsys：	N
其他特性：	REQUIRES AN AC SUPPLY OF 85 TO 265 V	模拟集成电路 - 其他类型：	SWITCHING REGULATOR
控制模式：	CURRENT-MODE	控制技术：	PULSE WIDTH MODULATION
JESD-30 代码：	R-PDIP-T7	JESD-609代码：	e3
长度：	9.575 mm	功能数量：	1
端子数量：	7	最高工作温度：	125 °C
最低工作温度：	-40 °C	最大输出电流：	0.44 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	DIP
封装形状：	RECTANGULAR	封装形式：	IN-LINE
峰值回流温度（摄氏度）：	NOT SPECIFIED	认证状态：	Not Qualified
表面贴装：	NO	切换器配置：	SINGLE
最大切换频率：	140 kHz	温度等级：	AUTOMOTIVE
端子面层：	MATTE TIN	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	7.62 mm
Base Number Matches：	1

TNY265 数据手册

TNY263-268

A simple constant current circuit is implemented using the V_BE

of transistor Q1 to sense the voltage across the current sense

resistor R4. When the drop across R4 exceeds the V_BEof

transistor Q1, it turns on and takes over control of the loop by

driving the optocoupler LED. Resistor R6 assures sufﬁcient

voltage to keep the control loop in operation down to zero

volts at the output. With the output shorted, the drop across

R4 and R6 (~1.2 V) is sufﬁcient to keep the Q1 and LED circuit

active. Resistors R7 and R9 limit the forward current that

could be drawn through VR1 by Q1 under output short circuit

conditions, due to the voltage drop across R4 and R6.

up undervoltage threshold is set at 200 VDC, slightly below

the lowest required operating DC input voltage, for start-up at

170 VAC, with doubler. This feature saves several components

needed to implement the glitch-free turn-off compared with

discrete or TinySwitch-II based designs. During turn-on the

rectiﬁed DC input voltage needs to exceed 200 V undervoltage

threshold for the power supply to start operation. But, once

the power supply is on it will continue to operate down to

140 V rectiﬁed DC input voltage to provide the required hold

up time for the standby output.

The auxiliary primary side winding is rectiﬁed and ﬁltered by

D2 and C2 to create a 12 V primary bias output voltage for the

main power supply primary controller. In addition, this voltage

is used to power the TinySwitch-II via R4. Although not

necessary for operation, supplying the TinySwitch-II externally

reduces the device quiescent dissipation by disabling the

internal drain derived current source normally used to keep the

BYPASS pin capacitor (C3) charged. An R4 value of 10 kΩ

provides 600 μA into the BYPASS pin, which is slightly in

excess of the current consumption of TinySwitch-II. The

excess current is safely clamped by an on-chip active Zener

diode to 6.3 V.

10 and 15 W Standby Circuits

Figures 15 and 16 show examples of circuits for standby

applications. They both provide two outputs: an isolated 5 V

and a 12 V primary referenced output. The ﬁrst, using

TNY266P, provides 10 W, and the second, using TNY267P,

15 W of output power. Both operate from an input range of

140 VDC to 375 VDC, corresponding to a 230 VAC or 100/115

VAC with doubler input. The designs take advantage of the line

undervoltage detect, auto-restart and higher switching

frequency of TinySwitch-II. Operation at 132 kHz allows the

use of a smaller and lower cost transformer core, EE16 for

10 W and EE22 for 15 W. The removal of pin 6 from the 8 pin

DIP TinySwitch-II packages provides a large creepage

distance which improves reliability in high pollution

environments such as fan cooled power supplies.

The secondary winding is rectiﬁed and ﬁltered by D3 and C6.

For a 15 W design an additional output capacitor, C7, is

required due to the larger secondary ripple currents compared

to the 10 W standby design. The auto-restart function limits

output current during short circuit conditions, removing the

need to over rate D3. Switching noise ﬁltering is provided by L1

and C8. The 5 V output is sensed by U2 and VR1. R5 is used

to ensure that the Zener diode is biased at its test current and

R6 centers the output voltage at 5 V.

Capacitor C1 provides high frequency decoupling of the high

voltage DC supply, only necessary if there is a long trace

length from the DC bulk capacitors of the main supply. The

line sense resistors R2 and R3 sense the DC input voltage for

line undervoltage. When the AC is turned off, the undervoltage

detect feature of the TinySwitch-II prevents auto-restart

glitches at the output caused by the slow discharge of large

storage capacitance in the main converter. This is achieved by

preventing the TinySwitch-II from switching when the input

voltage goes below a level needed to maintain output

In many cases the Zener regulation method provides sufﬁcient

accuracy (typically 6ꢀ over a 0 °C to 50 °C temperature

range). This is possible because TinySwitch-II limits the

dynamic range of the optocoupler LED current, allowing the

Zener diode to operate at near constant bias current.

However, if higher accuracy is required, a TL431 precision

reference IC may be used to replace VR1.

regulation, and keeping it off until the input voltage goes above

the undervoltage threshold, when the AC is turned on again.

With R2 and R3, giving a combined value of 2 MΩ, the power

Rev. H 02/09

www.powerint.com

1...5 6 789 10 11...22

中文翻译

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与TNY265相关器件

型号	品牌	获取价格	描述	数据表
TNY265G	POWERINT	获取价格	Enhanced, Energy Efficient, Low Power Off-line Switcher
TNY265GN	POWERINT	获取价格	Enhanced, Energy Efficient, Low Power Off-line Switcher
TNY265GN-TL	POWERINT	获取价格	Enhanced, Energy Efficient, Low Power Off-line Switcher
TNY265GTL	POWERINT	获取价格	Enhanced, Energy Efficient, Low Power Off-line Switcher
TNY265G-TL	POWERINT	获取价格	Enhanced, Energy Effi cient, Low Power Off-line Switcher
TNY265P	POWERINT	获取价格	Enhanced, Energy Efficient, Low Power Off-line Switcher
TNY265PG	POWERINT	获取价格	Enhanced, Energy Effi cient, Low Power Off-line Switcher
TNY265PN	POWERINT	获取价格	Enhanced, Energy Efficient, Low Power Off-line Switcher
TNY265PN-TL	POWERINT	获取价格	Enhanced, Energy Efficient, Low Power Off-line Switcher
TNY265PTL	POWERINT	获取价格	Enhanced, Energy Efficient, Low Power Off-line Switcher

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