- 您现在的位置：买卖IC网 > PDF目录15094 > UC3844N (ON Semiconductor)IC REG CTRLR PWM CM 8-DIP PDF资料下载
参数资料
| 型号： | UC3844N |
| 厂商： | ON Semiconductor |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 8-DIP |
| 产品变化通告： | Product Discontinuation 15/May/2006 |
| 标准包装： | 1,000 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 60kHz |
| 占空比： | 50% |
| 电源电压： | 10 V ~ 30 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 是 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 其它名称： | UC3844NOS |
UC3844, UC3845, UC2844, UC2845
MAXIMUM RATINGS
Rating
Total Power Supply and Zener Current
Output Current, Source or Sink (Note 1)
Output Energy (Capacitive Load per Cycle)
Current Sense and Voltage Feedback Inputs
Error Amp Output Sink Current
Power Dissipation and Thermal Characteristics
D Suffix, Plastic Package, Case 751A
Maximum Power Dissipation @ T A = 25 ° C
Thermal Resistance Junction ? to ? Air
N Suffix, Plastic Package, Case 626
Maximum Power Dissipation @ T A = 25 ° C
Thermal Resistance Junction ? to ? Air
Operating Junction Temperature
Operating Ambient Temperature
UC3844, UC3845
UC2844, UC2845
Storage Temperature Range
Symbol
(I CC + I Z )
I O
W
V in
I O
P D
R q JA
P D
R q JA
T J
T A
T stg
Value
30
1.0
5.0
? 0.3 to + 5.5
10
862
145
1.25
100
+ 150
0 to + 70
? 25 to + 85
? 65 to + 150
Unit
mA
A
m J
V
mA
mW
° C/W
W
° C/W
° C
° C
° C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Maximum Package power dissipation limits must be observed.
ELECTRICAL CHARACTERISTICS (V CC = 15 V, (Note 2), R T = 1 0 k, C T = 3.3 nF, T A = T low to T high (Note 3), unless otherwise noted.)
UC284X
UC384X
Characteristics
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
Total Output Variation over Line, Load, Temperature
Output Noise Voltage (f = 10 Hz to kHz, T J = 25 ° C)
Long Term Stability (T A = 125 ° C for 1000 Hours)
Output Short Circuit Current
V ref
Reg line
Reg load
T S
V ref
V n
S
I SC
4.95
?
?
?
4.9
?
?
? 30
5.0
2.0
3.0
0.2
?
50
5.0
? 85
5.05
20
25
?
5.1
?
?
? 180
4.9
?
?
?
4.82
?
?
? 30
5.0
2.0
3.0
0.2
?
50
5.0
? 85
5.1
20
25
?
5.18
?
?
? 180
V
mV
mV
mV/ ° C
V
m V
mV
mA
OSCILLATOR SECTION
Frequency
T J = 25 ° C
T A = T low to T high
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 (Peak ? to ? Peak)
Discharge Current (V osc = 2.0 V, T J = 25 ° C)
f osc
D f osc/ D V
D f osc/ D T
V osc
I dischg
47
46
?
?
?
?
52
?
0.2
5.0
1.6
10.8
57
60
1.0
?
?
?
47
46
?
?
?
?
52
?
0.2
5.0
1.6
10.8
57
60
1.0
?
?
?
kHz
%
%
V
mA
ERROR AMPLIFIER SECTION
Voltage Feedback Input (V O = 2.5 V)
Input Bias Current (V FB = 2.7 V)
Open Loop Voltage Gain (V O = 2.0 V to 4.0 V)
V FB
I IB
A VOL
2.45
?
65
2.5
? 0.1
90
2.55
? 1.0
?
2.42
?
65
2.5
? 0.1
90
2.58
? 2.0
?
V
m A
dB
2. Adjust V CC 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 UC3844, UC3845 T high = +70 ° C for UC3844, UC3845
? 25 ° C for UC2844, UC2845 +85 ° C for UC2844, UC2845
http://onsemi.com
2
相关PDF资料 |
PDF描述 |
|---|---|
| UC3845N | IC REG CTRLR PWM CM 8-DIP |
| ACA10DRSI-S288 | CONN EDGECARD EXTEND 20POS .125 |
| 380LX102M063H202 | CAP ALUM 1000UF 63V 20% SNAP |
| LLS2V151MELZ | CAP ALUM 150UF 350V 20% SNAP |
| GBM06DRST-S273 | CONN EDGECARD 12POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| UC3844NG | 功能描述:电流型 PWM 控制器 52kHz 1A Current PWM w/48% Duty Cycle Max RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 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 |
| UC3844NG4 | 功能描述:电流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 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 |
| UC3844P | 制造商:Texas Instruments 功能描述: |
| UC3844Q | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Current-Mode SMPS Controller |
| UC3844QTR | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Current-Mode SMPS Controller |
发布紧急采购，3分钟左右您将得到回复。