參數(shù)資料
型號(hào)： UC3845B
廠商： ON SEMICONDUCTOR
英文描述： High Performance Current Mode Controllers(高性能電流模式控制器)
中文描述： 高性能電流模式控制器（高性能電流模式控制器）
文件頁(yè)數(shù)： 2/18頁(yè)
文件大?。?/td> 400K
代理商： UC3845B
UC3844B, UC3845B, UC2844B, UC2845B
http://onsemi.com
2
MAXIMUM RATINGS
Rating
Symbol
(I
CC
+ I
Z
)
I
O
W
Value
30
Unit
mA
Total Power Supply and Zener Current
Output Current, Source or Sink (Note 1)
1.0
A
Output Energy (Capacitive Load per Cycle)
5.0
J
Current Sense and Voltage Feedback Inputs
V
in
I
O
0.3 to + 5.5
V
Error Amp Output Sink Current
10
mA
Power Dissipation and Thermal Characteristics
D Suffix, Plastic Package, SOIC14 Case 751A
Maximum Power Dissipation @ T
A
= 25
°
C
Thermal Resistance, JunctiontoAir
D1 Suffix, Plastic Package, SOIC8 Case 751
Maximum Power Dissipation @ T
A
= 25
°
C
Thermal Resistance, JunctiontoAir
N Suffix, Plastic Package, Case 626
Maximum Power Dissipation @ T
A
= 25
°
C
Thermal Resistance, JunctiontoAir
P
D
R
JA
P
D
R
JA
P
D
R
JA
T
J
T
A
862
145
702
178
1.25
100
mW
°
C/W
mW
°
C/W
W
°
C/W
°
C
°
C
Operating Junction Temperature
+150
Operating Ambient Temperature
UC3844B, UC3845B
UC2844B, UC2845B
0 to + 70
25 to + 85
Storage Temperature Range
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. Maximum package power dissipation limits must be observed.
T
stg
65 to +150
°
C
ELECTRICAL CHARACTERISTICS
(V
CC
= 15 V [Note 2], R
T
= 10 k, C
T
= 3.3 nF. For typical values T
A
= 25
°
C, for min/max values
T
A
is the operating ambient temperature range that applies [Note 3], unless otherwise noted.)
UC284XB
UC384XB, XBV
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
REFERENCE SECTION
Reference Output Voltage (I
O
= 1.0 mA, T
J
= 25
°
C)
Line Regulation (V
CC
= 12 V to 25 V)
Load Regulation (I
O
= 1.0 mA to 20 mA)
Temperature Stability
V
ref
Reg
line
Reg
load
T
S
V
ref
V
n
S
4.95
5.0
5.05
4.9
5.0
5.1
V
2.0
20
2.0
20
mV
3.0
25
3.0
25
mV
mV/
°
C
V
0.2
0.2
Total Output Variation over Line, Load, and Temperature
Output Noise Voltage (f = 10 Hz to 10 kHz, T
J
= 25
°
C)
Long Term Stability (T
A
= 125
°
C for 1000 Hours)
Output Short Circuit Current
4.9
5.1
4.82
5.18
50
50
V
5.0
5.0
mV
I
SC
30
85
180
30
85
180
mA
OSCILLATOR SECTION
Frequency
T
J
= 25
°
C
T
A
= T
low
to T
high
T
J
= 25
°
C (R
T
= 6.2 k, C
T
= 1.0 nF)
Frequency Change with Voltage (V
CC
= 12 V to 25 V)
Frequency Change with Temperature (T
A
= T
low
to T
high
)
Oscillator Voltage Swing (PeaktoPeak)
f
OSC
49
48
225
52
250
55
56
275
49
48
225
52
250
55
56
275
kHz
f
OSC
/ V
f
OSC
/ T
V
OSC
I
dischg
0.2
1.0
0.2
1.0
%
1.0
0.5
%
1.6
1.6
V
Discharge Current (V
OSC
= 2.0 V)
T
J
= 25
°
C
T
A
= T
low
to T
high
(UC284XB, UC384XB)
T
A
= T
low
to T
high
(UC384XBV)
2. Adjust V
above the Startup threshold before setting to 15 V.
3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
T
low
= 0
°
C for UC3844B, UC3845B
T
high
= + 70
°
C for UC3844B, UC3845B
= 25
°
C for UC2844B, UC2845B
= + 85
°
C for UC2844B, UC2845B
= 40
°
C for UC3844BV, UC3845BV
= +105
°
C for UC3844BV, UC3845BV
7.8
7.5
8.3
8.8
8.8
7.8
7.6
7.2
8.3
8.8
8.8
8.8
mA
相關(guān)PDF資料
PDF描述
UC2844Q OMNIFET FULLY AUTOPROTECTED POWER MOSFET
UC1845AY Digital controlled stereo audio processor
UC2844AM Octal low-side driver for resistive and inductive loads with serial/parallel input control, output protection and diagnostic
UC2844AY OMNIFET FULLY AUTOPROTECTED POWER MOSFET
UC2844J OMNIFET FULLY AUTOPROTECTED POWER MOSFET
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UC3845BAC 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:HIGH PERFORMANCE CURRENT MODE CONTROLLERS
UC3845BD 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
UC3845BD1 功能描述:電流型 PWM 控制器 PWM CONTROLLER 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
UC3845BD1013TR 功能描述:電流型 PWM 控制器 0.5mA Current Mode 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
UC3845BD1G 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*