DataSheet39.com

What is U3848B?

This electronic component, produced by the manufacturer "Unisonic Technologies", performs the same function as "HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS".


U3848B Datasheet PDF - Unisonic Technologies

Part Number U3848B
Description HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
Manufacturers Unisonic Technologies 
Logo Unisonic Technologies Logo 


There is a preview and U3848B download ( pdf file ) link at the bottom of this page.





Total 13 Pages



Preview 1 page

No Preview Available ! U3848B datasheet, circuit

UNISONIC TECHNOLOGIES CO., LTD
U3848/A/B/C
LINEAR INTEGRATED CIRCUIT
HIGH PERFORMANCE
CURRENT MODE PWM
CONTROLLERS
DESCRIPTION
The UTC U3848/A/B/C is designed to provide several special
enhancements to satisfy the needs: Power-Saving mode for low
standby power, Over Current Protection (OCP), Over Voltage
Protection (OVP), Over Load Protection (OLP), Over Temperature
Protection (OTP) etc protection features. IC will be shutdown when
either protection arise and can auto-restart. Its frequency may be
defined by user through resistor RT to external ground. UVLO
featuring typical start-up current 20µA, and VCC(ON) 12.6V, VCC(OFF)
8.1 . Lower typical operation current Icc 3.7mA at inactive output.
The output stage, suitable for driving N-Channel MOSFETs, can
operate to duty cycles approach 70%. The U3848/A/B/C are fully
pin-to-pin compatible with UC3842. But pin RT only connected a
resistor to ground to decide switch frequency, and pin FB with an
4kpull up resistor to internal reference voltage. The U3848/A/B/C
also have soft-start function avoiding overshoot, and controlled
www.DataSheet4U.com
driver output rise edge time tR for low EMI.
FEATURES
* Low startup and operation current
* User defined switching frequency(Norm is 70kHz)
* Max duty cycle 70%
* Power-saving mode for low power
* Under voltage lockout with hysteresis
* Over temperature protection
* Overload protection
* Over voltage protection
* Leading edge blanking
* Soft start
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
U3848-D08-T
U3848L-D08-T
U3848-S08-R
U3848L-S08-R
U3848-S08-T
U3848L-S08-T
U3848A-D08-T
U3848AL-D08-T
U3848A-S08-R
U3848AL-S08-R
U3848A-S08-T
U3848AL-S08-T
U3848B-D08-T
U3848BL-D08-T
U3848B-S08-R
U3848BL-S08-R
U3848B-S08-T
U3848BL-S08-T
U3848C-D08-T
U3848CL-D08-T
U3848C-S08-R
U3848CL-S08-R
U3848C-S08-T
U3848CL-S08-T
Package
DIP-8
SOP-8
SOP-8
DIP-8
SOP-8
SOP-8
DIP-8
SOP-8
SOP-8
DIP-8
SOP-8
SOP-8
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
DIP-8
SOP -8
*Pb-free plating product number:
U3848L/U3848AL/U3848BL/U3848CL
Packing
Tube
Tape Reel
Tube
Tube
Tape Reel
Tube
Tube
Tape Reel
Tube
Tube
Tape Reel
Tube
1 of 13
QW-R103-033.B

line_dark_gray
U3848B equivalent
U3848/A/B/C
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta 25°C, VCC=15V, RT=75k, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC 26
V
Input Voltage to FB Pin
Input Voltage to CS Pin
VFB -0.3 ~ 6.2
VCS -0.3 ~ 2.8
V
V
Input Voltage to RT Pin
VRT -0.3 ~ 6.2
V
Junction Temperature
Operating Temperature
TJ
TOPR
+150
-40 ~ +125
°C
°C
Storage Temperature
TSTG
-50 ~ +150
°C
Note Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
OPERATING RANGE
Supply Voltage
PARAMETER
SYMBOL
VCC
RATINGS
8.2 ~ 21
UNIT
V
ELECTRICAL CHARACTERISTICS (Ta 25°C, VCC=15V, RT=75k, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
SUPPLY SECTION
Start Up Current
Supply Current with switch
OFF
ON
ISTR VCC=12.5V
IOFF VSS = 0, IFB = 0
ION VSS = 5V, IFB = 0
UNDER-VOLTAGE LOCKOUT SECTION
Start Threshold Voltage
VTHD(ON)
Min. Operating Voltage
VCC(MIN)
Hysteresis
VCC(HY)
INTERNAL VOLTAGE REFERENCE
Reference Voltage
VREF measured at pin VREF
CONTROL SECTION
Switch Frequency
Normal
Power-Saving
Duty Cycle
MAX
MIN
VFB Operating Level
MIN
MAX
Feedback Resistor
External Resistor for controlling Current
Source of OSC
F(SW)
DMAX
DMIN
VMIN
VMAX
RFB
RT
VFB = 4V
VFB = 1V
U3848/B(Note1)
U3848A/C(Note2)
VFB < 0.5V
Soft-Start Time
CSS=0.05uF
TSS CSS=0.1uF
CSS=1uF
PROTECTION SECTION
OVP threshold
OLP threshold
OTP threshold
OVP Disable threshold
OLP Enable threshold
Spike Blanking time
V(OVP) VSS < 3.5V, VFB > 5V
VFB(OLP) VSS > 5.4V
T(THR)
VSS(DEACT) VFB > 5V, VCC > 17V
VSS(ACT) VFB > 5V
TSB
CURRENT LIMITING SECTION
LEB
tLEB
MIN
11.8
7.6
6.1
85
61
17
65
0
0.5
2.6
15.2
4.4
120
3.7
4.9
TYP
27
3.7
4.0
12.6
8.1
4.5
6.3
95
68
20
70
3.8
75
6
12
120
16
4.6
135
3.9
5.1
7.2
220
MAX UNIT
45 µA
5.5 mA
6.0 mA
13.4 V
8.6 V
V
6.6 V
105 kHz
75 kHz
23 kHz
75 %
%
V
4.4 V
5.0 k
k
ms
ms
ms
16.8 V
4.9 V
150 °C
4.2 V
5.4 V
µs
ns
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 13
QW-R103-033,B


line_dark_gray

Preview 5 Page


Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for U3848B electronic component.


Information Total 13 Pages
Link URL [ Copy URL to Clipboard ]
Download [ U3848B.PDF Datasheet ]

Share Link :

Electronic Components Distributor


An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists.


SparkFun Electronics Allied Electronics DigiKey Electronics Arrow Electronics
Mouser Electronics Adafruit Newark Chip One Stop


Featured Datasheets

Part NumberDescriptionMFRS
U3848The function is HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS. Unisonic TechnologiesUnisonic Technologies
U3848AThe function is HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS. Unisonic TechnologiesUnisonic Technologies
U3848BThe function is HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS. Unisonic TechnologiesUnisonic Technologies

Semiconductors commonly used in industry:

1N4148   |   BAW56   |   1N5400   |   NE555   |  

LM324   |   BC327   |   IRF840  |   2N3904   |  



Quick jump to:

U384     1N4     2N2     2SA     2SC     74H     BC     HCF     IRF     KA    

LA     LM     MC     NE     ST     STK     TDA     TL     UA    



Privacy Policy   |    Contact Us     |    New    |    Search