參數(shù)資料
型號： UC2845AL
文件頁數(shù)： 1/8頁
文件大?。?/td> 530K
代理商： UC2845AL
UC1842A/3A/4A/5A
UC2842A/3A/4A/5A
UC3842A/3A/4A/5A
SLUS224A - SEPTEMBER 1994 - REVISED APRIL 2002
Optimized for Off-line and DC to DC
Converters
Low Start Up Current (<0.5mA)
Trimmed Oscillator Discharge Current
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 R
O
Error Amp
Current Mode PWM Controller
The UC1842A/3A/4A/5A family of control ICs is a pin for pin compati-
ble improved version of the UC3842/3/4/5 family. Providing the nec-
essary features to control current mode switched mode power
supplies, this family has the following improved features. Start up cur-
rent is guaranteed to be less than 0.5mA. Oscillator discharge is
trimmed to 8.3mA. During under voltage lockout, the output stage
can sink at least 10mA at less than 1.2V for V
CC
over 5V.
The difference between members of this family are shown in the table
below.
BLOCK DIAGRAM
FEATURES
DESCRIPTION
application
INFO
available
Part #
UVLO On
UVLO Off
Maximum Duty
Cycle
<100%
<100%
<50%
<50%
UC1842A
UC1843A
UC1844A
UC1845A
16.0V
8.5V
16.0V
8.5V
10.0V
7.9V
10.0V
7.9V
Note 1:
Note 2: Toggle flip flop used only in 1844A and 1845A.
A = DIL-8 Pin Number. B = SO-14 Pin Number.
A/B
相關(guān)PDF資料
PDF描述
UC1842AL Automotive 8-bit MCU, with up to 32 Kbytes Flash, EEPROM, 10-bit ADC, timers, LIN, SPI, I2C, 3 V to 5.5 V
UC1849DW Digitally controlled audio processor
UC1849DWTR Digitally controlled audio processor
UC1849N Analog IC
UC1849PW Digitally controlled audio processor
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UC2845AM 功能描述:IC REG CTRLR BST FLYBK ISO 8-DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR)
UC2845AN 功能描述:電流型 PWM 控制器 Current Mode RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
UC2845ANG4 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
UC2845AQ 制造商:Rochester Electronics LLC 功能描述:- Bulk
UC2845AQD 功能描述:電流型 PWM 控制器 Auto Cat Crrnt-Mode RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
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