Datasheet > NCP1252EDR2G

NCP1252EDR2G

更新时间： 2022-02-26 11:35:21

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
20页	191K
描述
Current Mode PWM Controller for Forward and Flyback Applications

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NCP1252EDR2G 数据手册

NCP1252

Vbulk

Vout

NCP1252

Vcc

100 nF*

*Minimum recommended

decoupling capacitor value

Figure 1. Typical Application

Table 1. PIN FUNCTIONS

Pin No.

Pin Name

Function

Feedback

Pin Description

This pin directly connects to an optocoupler collector.

Brown−out input

Current sense

This pin monitors the input voltage image to offer a Brown−out protection.

Monitors the primary current and allows the selection of the ramp com-

pensation amplitude.

Timing element

A resistor connected to ground fixes the switching frequency.

The controller ground pin.

GND

Drv

−

Driver

This pin connects to the MOSFET gate

This pin accepts voltage range from 8 V up to 28 V

SSTART

Soft−start

A capacitor connected to ground selects the soft−start duration. The soft

start is grounded during the delay timer

Table 2. MAXIMUM RATINGS TABLE (Notes 1 and 2)

Symbol Rating

Power Supply voltage, Vcc pin, transient voltage: 10 ms with I

Value

Unit

< 20 mA

Vcc

Power Supply voltage, Vcc pin, continuous voltage

Maximum current injected into pin 7

Maximum voltage on low power pins (except pin 6, 7)

Thermal Resistance Junction−to−Air – PDIP8

Thermal Resistance Junction−to−Air – SOIC8

Maximum Junction Temperature

Vcc

−0.3 to 10

131

°C/W

°C

JA – PDIP8

169

JA – SOIC8

150

MAX

Storage Temperature Range

−60 to +150

1.8

°C

ESD Capability, HBM model

ESD Capability, Machine Model

200

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality

should not be assumed, damage may occur and reliability may be affected.

1. This device series contains ESD protection and exceeds the following tests: Human Body Model 1800 V per JEDEC Standard

JESD22−A114E. Machine Model Method 200 V per JEDEC Standard JESD22−A115A.

2. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78.

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