UC2845AAY中文资料PDF规格书
UC2845AAY规格书详情
DESCRIPTION
The UC184xA family of control ICs provides all the necessary features to implement off-line fixed-frequency, current-mode switching power supplies with a minimum of external components. The current mode architecture demonstrates improved load regulation, pulse-by-pulse current limiting and inherent protection of the power supply output switch. The IC includes: A bandgap reference trimmed to ±1 accuracy, an error amplifier, a current sense comparator with internal clamp to 1V, a high current totem pole output stage for fast switching of power MOSFETs, and an externally programmable oscillator to set frequency and maximum duty cycle. The undervoltage lock-out is designed to operate with 250µA typ. start-up current, allowing an efficient bootstrap supply voltage design.
KEY FEATURES
■ LOW START-UP CURRENT. (0.5mA max.)
■ TRIMMED OSCILLATOR DISCHARGE CURRENT. (See Product Highlight)
■ OPTIMIZED FOR OFF-LINE AND DC-TO-DC CONVERTERS.
■ AUTOMATIC FEED FORWARD COMPENSATION.
■ PULSE-BY-PULSE CURRENT LIMITING.
■ ENHANCED LOAD RESPONSE CHARACTERISTICS.
■ UNDER-VOLTAGE LOCKOUT WITH HYSTERESIS.
■ DOUBLE PULSE SUPPRESSION.
■ HIGH-CURRENT TOTEM POLE OUTPUT.
■ INTERNALLY TRIMMED BANDGAP REFERENCE.
■ 500KHz OPERATION.
■ LOW RO ERROR AMPLIFIER.
APPLICATIONS
■ ECONOMICAL OFF-LINE FLYBACK OR FORWARD CONVERTERS.
■ DC-DC BUCK OR BOOST CONVERTERS.
■ LOW COST DC MOTOR CONTROL.
产品属性
- 型号:
UC2845AAY
- 制造商:
MICROSEMI
- 制造商全称:
Microsemi Corporation
- 功能描述:
CURRENT MODE PWM CONTROLLER
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
TI/TEXAS |
23+ |
原厂封装 |
8931 |
询价 | |||
TI/PBF |
20+ |
SOP14 |
2960 |
诚信交易大量库存现货 |
询价 | ||
TI/PBF |
22+ |
SOP14 |
2960 |
诚信交易大量库存现货 |
询价 | ||
23+ |
N/A |
36200 |
正品授权货源可靠 |
询价 | |||
MicrosemiCorporation |
2019+ |
14-SOIC |
65500 |
原装正品货到付款,价格优势! |
询价 | ||
TI |
2020+ |
SOP-8 |
16800 |
绝对原装进口现货,假一赔十,价格优势! |
询价 | ||
TI |
00+ |
SOP14 |
294 |
全新原装进口自己库存优势 |
询价 | ||
TI |
17+ |
SOP14 |
9988 |
只做原装进口,自己库存 |
询价 | ||
MicrosemiCorporation |
23+ |
14-SOIC |
66800 |
原装正品现货 |
询价 | ||
UNITRODE |
23+ |
SOP |
65480 |
询价 |