參數(shù)資料
型號(hào)： UC2845BD1R2
廠商： ON SEMICONDUCTOR
元件分類： 穩(wěn)壓器
英文描述： HIGH PERFORMANCE CURRENT MODE CONTROLLERS
中文描述： 1 A SWITCHING CONTROLLER, 275 kHz SWITCHING FREQ-MAX, PDSO8
封裝： SOIC-8
文件頁(yè)數(shù)： 2/15頁(yè)
文件大?。?/td> 135K
代理商： UC2845BD1R2
* All voltages arewith respect to pin 5, all currentsare positive into the specified terminal.
PIN CONNECTION
(top view)
COMP
V
FB
I
SENSE
R
T
/C
T
GROUND
OUTPUT
Vi
V
REF
1
3
2
4
6
5
7
8
D95IN332
Minidip/SO8
ORDERINGNUMBERS
SO8
Minidip
UC2842BD1; UC3842BD1
UC2843BD1; UC3843BD1
UC2844BD1; UC3844BD1
UC2845BD1; UC3845BD1
UC2842BN; UC3842BN
UC2843BN; UC3843BN
UC2844BN; UC3844BN
UC2845BN; UC3845BN
ABSOLUTE MAXIMUM RATINGS
Symbol
V
i
V
i
I
O
E
O
Parameter
Value
30
Self Limiting
±
1
5
– 0.3 to 5.5
10
1.25
800
– 65 to 150
– 40 to 150
300
Unit
V
Supply Voltage (low impedance source)
Supply Voltage (Ii < 30mA)
Output Current
Output Energy (capacitive load)
Analog Inputs (pins 2, 3)
Error Amplifier Output SinkCurrent
Power Dissipation at T
amb
≤
25
°
C (Minidip)
Power Dissipation at Tamb
≤
25
°
C (SO8)
Storage Temperature Range
Junction Operating Temperature
Lead Temperature (soldering 10s)
A
μ
J
V
mA
W
mW
°
C
°
C
°
C
P
tot
P
tot
T
stg
T
J
T
L
PIN FUNCTIONS
No
1
Function
COMP
Description
This pin is the Error Amplifier output and is made available for loop compensation.
2
V
FB
This is the inverting input of the Error Amplifier. It is normally connected to the switching
power supply output through a resistor divider.
A voltage proportional to inductor current is connected to this input. The PWM uses this
information to terminate the output switch conduction.
The oscillator frequency and maximum Output duty cycle are programmed by connecting
resistor R
T
to Vref and cpacitor C
T
to ground. Operation to 500kHz is possible.
This pin is the combined control circuitry and power ground.
3
I
SENSE
4
R
T
/C
T
5
GROUND
6
OUTPUT
This output directly drives the gate of a power MOSFET. Peak currents up to 1A are sourced
and sunk by this pin.
This pin is the positive supply of the control IC.
7
V
CC
V
ref
8
This is the reference output. It provides charging current for capacitor C
T
through resistor R
T
.
UC2842B/3B/4B/5B - UC3842B/3B/4B/5B
2/15
相關(guān)PDF資料
PDF描述
UC2845BD1 HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3843A HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3843AD1 HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3843AJ Current Mode PWM Controller
UC3843A CURRENT MODE PWM CONTROLLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UC2845BD1R2G 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM w/48% Duty Cycle Max RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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
UC2845BDG 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM w/48% Duty Cycle Max RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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
UC2845BDR2 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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
UC2845BDR2G 功能描述:電流型 PWM 控制器 52kHz 1A Current PWM w/48% Duty Cycle Max RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)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
UC2845BG 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:HIGH PERFORMANCE CURRENT MODE CONTROLLERS
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