UC3845AD1中文资料PDF规格书
UC3845AD1规格书详情
1 FEATURES
■ TRIMMED OSCILLATOR DISCHARGE
CURRENT
■ CURRENT MODE OPERATION TO 500kHz
AUTOMATIC FEED FORWARD
COMPENSATION
■ LATCHING PWM FOR CYCLE-BY-CYCLE
CURRENT LIMITING
■ INTERNALLY TRIMMED REFERENCE WITH
UNDERVOLTAGE LOCKOUT
■ HIGH CURRENT TOTEM POLE OUTPUT
UNDERVOLTAGE LOCKOUT WITH
HYSTERESIS
■ LOW START-UP CURRENT (< 0.5mA)
DOUBLE PULSE SUPPRESSION
2 DESCRIPTION
The UC384xA family of control ICs provides the
necessary features to implement off-line or DC to
DC fixed frequency current mode control schemes
with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for
precise DUTY CYCLE CONTROL under voltage
lockout featuring start-up current less than 0.5mA,
a precision reference trimmed for accuracy at the
error amp input, logic to insure latched operation,
a PWM comparator which also provides current
limit control, and a totem pole output stage designed to source or sink high peak current. The
output stage, suitable for driving N-Channel MOSFETs, is low in the off-state.
Differences between members of this family are
the under-voltage lockout thresholds and maximum duty cycle ranges. The UC3842A and
UC3844A have UVLO thresholds of 16V (on) and
10V (off), ideally suited off-line applications The
corresponding thresholds for the UC3843A and
UC3845A are 8.5 V and 7.9V. The UC3842A and
UC3843A can operate to duty cycles approaching
100. A range of the zero to < 50 is obtained by
the UC3844A and UC3845A by the addition of an
internal toggle flip flop which blanks the output off
every other clock cycle.
产品属性
- 型号:
UC3845AD1
- 功能描述:
电流型 PWM 控制器 RO 511-UC3845BD 9/04
- RoHS:
否
- 制造商:
Texas Instruments
- 开关频率:
27 KHz
- 工作电源电压:
6 V to 15 V
- 工作电源电流:
1.5 mA
- 输出端数量:
1
- 最大工作温度:
+ 105 C
- 安装风格:
SMD/SMT
- 封装/箱体:
TSSOP-14
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
ST |
23+ |
SOP8 |
20000 |
原厂原装正品现货 |
询价 | ||
STM |
21+ |
SOP8 |
35200 |
一级代理/放心采购 |
询价 | ||
ST |
22+ |
SOP8 |
25000 |
只做原装进口现货,专注配单 |
询价 | ||
STM |
23+ |
原厂封装 |
6542 |
原装现货 |
询价 | ||
ST/意法 |
新批次 |
SOP-8 |
4326 |
询价 | |||
ST |
2020+ |
SOP8 |
80000 |
只做自己库存,全新原装进口正品假一赔百,可开13%增 |
询价 | ||
ST/意法 |
22+ |
SOP-8 |
15330 |
原装正品 |
询价 | ||
ST |
20+ |
SOP8 |
25000 |
全新原装现货,假一赔十 |
询价 | ||
STM |
2020+ |
SOP8 |
6396 |
公司主营品牌,全新原装现货超低价! |
询价 | ||
STM |
21+ |
SOP8 |
6000 |
绝对原裝现货 |
询价 |