PWM CONTROLLER. UTC1869 Datasheet

UTC1869 CONTROLLER. Datasheet pdf. Equivalent

UTC1869 Datasheet
Recommendation UTC1869 Datasheet
Part UTC1869
Description HIGH FREQUENCY PWM CONTROLLER
Feature UTC1869; UTC1869 HIGH FREQUENCY PWM CONTROLLER LINEAR INTEGRATED CIRCUIT DESCRIPTION The UTC1869 is a high .
Manufacture YW
Datasheet
Download UTC1869 Datasheet




YW UTC1869
UTC1869
HIGH FREQUENCY PWM
CONTROLLER
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
The UTC1869 is a high frequency PWM controller integrates
required functions for boost conversion in a small SOP-8
package . A low 0.21V feedback voltage make the UTC1869
be an ideal contoller for LED backlight supplies .
FEATURES
* Voltage Mode PWM Controller
* Low 0.21V reference Voltage
* 180KHz Operation
* Deadtime Control
* Internal UVLO(Under Voltage Lock Out)
* Limited Output Duty Cycle
* Low Shutdown current
* SOP-8 Package
* Soft Setup
ABSOLUTE MAXIMUM RATINGS
(Unless otherwise noted ,all is over operating free-air temperature Range)
Characteristic
Value
Supply Voltage
7-40
Input Voltage
-0.3 Vcc+0.3
Operating Ambit Temperature Range
Extreme Operating Ambient Temp
0 70
-40 85
Operating Junction Temperature
Storage Temperature
+150
-55 150
SOP-8
Unit
V
V
°C
°C
°C
°C
RECOMMENDED OPERATING CONDITION
Characteristic
Value
Supply Voltage
36
Operating Ambient Temperature
0 70
BLOCK DIAGRAM
Unit
V
°C
YOUWANG ELECTRONICS CO.LTD
1
2012.07.11 V1.6



YW UTC1869
UTC1869
PIN CONFIGURATIONS
LINEAR INTEGRATED CIRCUIT
PIN FUNCTIONS
Pin No. Pin Name
1 IN
2 FB
3 DT
4 GND
5 OUT
6 VCC
7 EA
8 Vref
Function
Sampling signal input
Feedback PWM input
Deadtime Control
GND
PWM output
Power supply
Enable
Internal 5V reference
YOUWANG ELECTRONICS CO.LTD
2
2012.07.11 V1.6



YW UTC1869
UTC1869
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range,VCC=12V,Unless otherwise specified)
Characteristic
Test Conditions
Min Typ Max
Reference Section
Feedback voltage
0.21
Output voltage
Io=1mA
5
Input regulation
Vcc=7V to 36V
2 50
Output Regulation
Io=1 to 10mA
1 15
Output Voltage change with
TA=MIN to MAX(note 2)
0.2 1
Temperature
Short-circuit output Current
Characteristic
Vref=0
Test Conditions
35
Min Typ Max
Oscillator section
Frequency
180
Standard Deviation of Frequency
20
Amplifier Section
Input offset Voltage
Vo(pin 2)=2.5V
2 10
Input offset Current
Vo(pin 2)=2.5V
25 250
Input bias Current
Vo(pin 2)=2.5V
0.2 1
Input Voltage Range
Vcc=7V to 25 V
-0.3 to
Vcc-2
Open-Loop Voltage Amplification
Vo=3V, Vo=0.5V to 3.5V
70 95
Unity-Gain Bandwidth
800
Rejection ratio
Vcc=25V,TA=25°C
65 80
Output Section
VOUT
Dead Time Control Section
Low
High
Io= -200mA
0.1 0.3
VCC-1.5 VCC-2.5
Maximum duty cycle,each output
VI(pin 3)=0
85
Input threshold Voltage(pin3)
Zero duty Cycle
3 3.3
Maximum duty cycle
0
Grounding resistance
80
PWM comparator Section
Input Threshold Voltage(pin 2)
Zero Duty cycle
0.1 0.2
Input sink current (pin 2)
Vpin 2= 0.7V
0.3 0.7
Total Device
Standby supply current
Vcc=12V All Inputs and outputs open
6 10
Vcc=25V EA High
9 15
EA Low
0.1
Under Voltage Look Out
Upper threshold voltage
Ta=2
6.2 6.4 6.6
Switching Characteristics,Ta=25°C
Output Voltage rise time
100 200
Output Voltage fall time
100 200
EA Section
Enable
Low
0 0.2
High
25
EA Grounding resistance
20
Unit
V
V
mV
mV
%
mA
Unit
kHz
%
mV
nA
µA
V
dB
kHz
dB
V
V
%
V
V
k
V
mA
mA
mA
mA
V
ns
ns
V
V
k
note 1:All typical Values except for temperature coefficient are at Ta=25°C.
note 2:For conditions shown as MIN or MAX, use appropriate value under recommended operating conditions.
note 3:Duration of the short-circuit should not exceed one second.
YOUWANG ELECTRONICS CO.LTD
3
2012.07.11 V1.6





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