- 您现在的位置：买卖IC网 > PDF目录225404 > UC3845DX (FAIRCHILD SEMICONDUCTOR CORP) PDF资料下载
参数资料
| 型号： | UC3845DX |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | SOP-14 |
| 文件页数： | 14/20页 |
| 文件大小： | 249K |
| 代理商： | UC3845DX |
UC3842/UC3843/UC3844/UC3845
3
Electrical Characteristics
(VCC=15V, RT=10k
, CT=3.3nF, TA= 0°C to +70°C, unless otherwise specified)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
REFERENCE SECTION
Reference Output Voltage
VREF
TJ = 25
°C, IREF = 1mA
4.90
5.00
5.10
V
Line Regulation
VREF
12V
≤ VCC ≤ 25V
-
6
20
mV
Load Regulation
VREF
1mA
≤ IREF ≤ 20mA
-
6
25
mV
Short Circuit Output Current
ISC
TA = 25
°C
-
-100
-180
mA
OSCILLATOR SECTION
Oscillation Frequency
f
TJ = 25
°C47
52
57
kHz
Frequency Change with
Voltage
f/VCC
12V
≤ VCC ≤ 25V
-
0.05
1
%
Oscillator Amplitude
VOSC
-
-1.6
-
VP-P
ERROR AMPLIFIER SECTION
Input Bias Current
IBIAS
-
--0.1
-2
A
Input Voltage
VI(E>A)
Vpin1 = 2.5V
2.42
2.50
2.58
V
Open Loop Voltage Gain
GVO
2V
≤ VO ≤ 4V (Note3)
65
90
-
dB
Power Supply Rejection Ratio
PSRR
12V
≤ VCC ≤ 25V (Note3)
60
70
-
dB
Output Sink Current
ISINK
Vpin2 = 2.7V, Vpin1 = 1.1V
2
7
-
mA
Output Source Current
ISOURCE
Vpin2 = 2.3V, Vpin1 = 5V
-0.6
-1.0
-
mA
High Output Voltage
VOH
Vpin2 = 2.3V, RL = 15k
to GND
5
6
-
V
Low Output Voltage
VOL
Vpin2 = 2.7V, RL = 15k
to Pin 8
-
0.8
1.1
V
CURRENT SENSE SECTION
Gain
GV
(Note 1 & 2)
2.85
3
3.15
V/V
Maximum Input Signal
VI(MAX)
Vpin1 = 5V(Note 1)
0.9
1
1.1
V
Power Supply Rejection Ratio
PSRR
12V
≤ VCC ≤ 25V (Note 1,3)
-
70
-
dB
Input Bias Current
IBIAS
-
--3
-10
A
OUTPUT SECTION
Low Output Voltage
VOL
ISINK = 20mA
-
0.08
0.4
V
ISINK = 200mA
-
1.4
2.2
V
High Output Voltage
VOH
ISOURCE = 20mA
13
13.5
-
V
ISOURCE = 200mA
12
13.0
-
V
Rise Time
tR
TJ = 25
°C, CL= 1nF (Note 3)
-
45
150
ns
Fall Time
tF
TJ = 25
°C, CL= 1nF (Note 3)
-
35
150
ns
UNDER-VOLTAGE LOCKOUT SECTION
Start Threshold
VTH(ST)
UC3842/UC3844
14.5
16.0
17.5
V
UC3843/UC3845
7.8
8.4
9.0
V
Min. Operating Voltage
(After Turn On)
VOPR(MIN)
UC3842/UC3844
8.5
10.0
11.5
V
UC3843/UC3844
7.0
7.6
8.2
V
相关PDF资料 |
PDF描述 |
|---|---|
| UC3842DX | |
| UC3844ADW | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| UC3902DTRG4 | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| UC5306X | T-1 3/4 SINGLE COLOR LED, BLUE GREEN, 5 mm |
| UCC2919DTR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| UC3845G-D08-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3845G-S08-R | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3845G-S08-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
| UC3845J | 制造商:Texas Instruments 功能描述:Current Mode PWM Controller 1A 8-Pin CDIP Tube |
| UC3845L-D08-T | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS |
发布紧急采购，3分钟左右您将得到回复。