UC3842AD

更新时间： 2024-01-03 19:41:43

品牌	Logo	应用领域
德州仪器 - TI		开关光电二极管控制器
页数	文件大小	规格书
11页	659K
描述
Current Mode PWM Controller

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

UC3842AD 数据手册

UC1842A/3A/4A/5A

UC2842A/3A/4A/5A

UC3842A/3A/4A/5A

ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for –55°C ≤ TA ≤ 125°C for the

UC184xA; –40°C ≤ TA ≤ 125°C for the UC284xAQ; –40°C ≤ TA ≤ 85°C for the UC284xA; 0 ≤ TA ≤ 70°C for the UC384xA; VCC = 15V

(Note 5); RT = 10k; CT = 3.3nF; TA = TJ; Pin numbers refer to DIL-8.

UC184xA\UC284xA

UC384xA

PARAMETER

TEST CONDITIONS

UNITS

MIN. TYP. MAX. MIN. TYP. MAX.

Under-Voltage Lockout Section

Start Threshold

x842A/4A

7.8

8.4

9.0

14.5

7.8

8.5

7.0

8.4

17.5

9.0

x843A/5A

x842A/4A

x843A/5A

Min. Operation Voltage After

Turn On

11.5

8.2

7.0

7.6

8.2

7.6

PWM Section

Maximum Duty Cycle

x842A/3A

x844A/5A

100

Minimum Duty Cycle

Total Standby Current

Start-Up Current

0.3

0.5

0.3

0.5

Operating Supply Current

VCC Zener Voltage

VPIN 2 = VPIN 3 = 0V

ICC = 25mA

Note 2: Ensured by design, but not 100% production tested.

Note 3: Parameter measured at trip point of latch with VPIN2 = 0.

∆VPIN 1

Note 4: Gain defined as: A =

; 0 VPIN 3 0.8V.

∆VPIN 3

Note 5: Adjust VCC above the start threshold before setting at 15V.

Note 6: Output frequency equals oscillator frequency for the UC1842A and UC1843A. Output frequency is one half oscillator fre-

quency for the UC1844A and UC1845A.

Note 7: “Temperature stability, sometimes referred to as average temperature coefficient, is described by the equation:

VREF (max ) −VREF (min)

Temp Stability =

.VREF (max) and VREF (min) are the maximum & minimum reference volt-

TJ (max ) −TJ (min)

age measured over the appropriate temperature range. Note that the extremes in voltage do not necessarily occur at the extremes

in temperature.”

Note 8: This parameter is measured with RT = 10k to VREF.This contributes approximately 300 A of current to the measurement.

The total current flowing into the RT/C pin will be approximately 300 A higher than the measured value.

Error Amp Configuration

Error Amp can Source and Sink up to 0.5mA, and Sink up to 2mA.

1 2 345 6 7...11

下载PDF

与UC3842AD相关器件

型号	品牌	描述	获取价格	数据表
UC3842A-D08-T	UTC	CURRENT MODE PWM CONTROL CIRCUITS	获取价格
UC3842AD1	STMICROELECTRONICS	HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER	获取价格
UC3842AD8	TI	Current Mode PWM Controller	获取价格
UC3842AD8G4	TI	Current Mode PWM Controller	获取价格
UC3842AD8TR	TI	Current Mode PWM Controller	获取价格
UC3842AD8TRG4	TI	具有 16V/10V UVLO 和 100% 占空比、温度范围为 0°C 至 70°C 的	获取价格