Datasheet > TOP246PN-TL

TOP246PN-TL

更新时间： 2024-01-16 11:39:33

品牌	Logo	应用领域
帕沃英蒂格盛 - POWERINT		开关
页数	文件大小	规格书
52页	2175K
描述
TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher

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技术参数
数据手册

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TOP246PN-TL 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	SFM
包装说明：	TO-220,	针数：	3
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.68
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：	VOLTAGE-MODE	控制技术：	PULSE WIDTH MODULATION
JESD-30 代码：	R-PZFM-T6	JESD-609代码：	e0
功能数量：	1	端子数量：	6
最高工作温度：	125 °C	最低工作温度：	-40 °C
最大输出电流：	4.32 A	封装主体材料：	PLASTIC/EPOXY
封装代码：	TO-220	封装形状：	RECTANGULAR
封装形式：	FLANGE MOUNT	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
技术：	CMOS	温度等级：	AUTOMOTIVE
端子面层：	TIN LEAD	端子形式：	THROUGH-HOLE
端子位置：	ZIG-ZAG	处于峰值回流温度下的最长时间：	NOT SPECIFIED
Base Number Matches：	1

TOP246PN-TL 数据手册

TOP242-250

CONTROL (C) Pin Operation

voltage of 5.8 V, current in excess of the consumption of the

chip is shunted to SOURCE through resistor R_Eas shown in

Figure2. ThiscurrentﬂowingthroughR_Econtrolsthedutycycle

of the power MOSFET to provide closed loop regulation. The

shunt regulator has a ﬁnite low output impedance Z_Cthat sets

the gain of the error ampliﬁer when used in a primary feedback

conﬁguration. The dynamic impedance Z_Cof the CONTROL

pin together with the external CONTROL pin capacitance sets

the dominant pole for the control loop.

The CONTROL pin is a low impedance node that is capable

of receiving a combined supply and feedback current. During

normal operation, a shunt regulator is used to separate the

feedbacksignalfromthesupplycurrent. CONTROLpinvoltage

V_Cis the supply voltage for the control circuitry including the

MOSFET gate driver. An external bypass capacitor closely

connectedbetweentheCONTROLandSOURCEpinsisrequired

tosupplytheinstantaneousgatedrivecurrent. Thetotalamount

of capacitance connected to this pin also sets the auto-restart

timing as well as control loop compensation.

When a fault condition such as an open loop or shorted output

prevents the ﬂow of an external current into the CONTROL

pin, the capacitor on the CONTROL pin discharges towards

4.8 V. At 4.8 V, auto-restart is activated which turns the output

MOSFET off and puts the control circuitry in a low current

standby mode. The high-voltage current source turns on and

charges the external capacitance again. A hysteretic internal

supply under-voltage comparator keeps V_Cwithin a window

of typically 4.8 V to 5.8 V by turning the high-voltage current

source on and off as shown in Figure 8. The auto-restart

circuit has a divide-by-eight counter which prevents the output

MOSFET from turning on again until eight discharge/charge

cycles have elapsed. This is accomplished by enabling the

outputMOSFETonlywhenthedivide-by-eightcounterreaches

full count (S7). The counter effectively limits TOPSwitch-GX

power dissipation by reducing the auto-restart duty cycle

to typically 4%. Auto-restart mode continues until output

voltage regulation is again achieved through closure of the

feedback loop.

When rectiﬁed DC high voltage is applied to the DRAIN

pin during start-up, the MOSFET is initially off, and the

CONTROL pin capacitor is charged through a switched high

voltagecurrentsourceconnectedinternallybetweentheDRAIN

and CONTROL pins. When the CONTROL pin voltage V_C

reaches approximately 5.8 V, the control circuitry is activated

and the soft-start begins. The soft-start circuit gradually

increases the duty cycle of the MOSFET from zero to the

maximum value over approximately 10 ms. If no external

feedback/supply current is fed into the CONTROL pin by the

end of the soft-start, the high voltage current source is turned

off and the CONTROL pin will start discharging in response

to the supply current drawn by the control circuitry. If the

power supply is designed properly, and no fault condition

such as open loop or shorted output exists, the feedback loop

will close, providing external CONTROL pin current, before

the CONTROL pin voltage has had a chance to discharge to

the lower threshold voltage of approximately 4.8 V (internal

supply under-voltage lockout threshold). When the externally

fed current charges the CONTROL pin to the shunt regulator

Oscillator and Switching Frequency

The internal oscillator linearly charges and discharges an

V_UV

V_LINE

0 V

S7 S0

S1 S2

5.8 V

4.8 V

V_C

0 V

V_DRAIN

0 V

V_OUT

0 V

Note: S0 through S7 are the output states of the auto-restart counter

PI-2545-082299

Figure 8. Typical Waveforms for (1) Power Up (2) Normal Operation (3) Auto-Restart (4) Power Down.

12/04

1...3 4 567 8 9...52

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TOP246P-TL	POWERINT	TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switche	获取价格
TOP246R	POWERINT	Family Extended Power, Design Flexible,Integrated Off-line Switcher	获取价格
TOP246R-	POWERINT	TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switche	获取价格
TOP246RN-	POWERINT	TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switche	获取价格
TOP246RN-TL	POWERINT	TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switche	获取价格
TOP246R-TL	POWERINT	TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switche	获取价格

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