View U9751B-S16-T_749536.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

UNISONIC TECHNOLOGIES CO., LTD U9751B
DOUBLE CHANNELS PWM CONTROLLER
SOP-16
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
The UTC U9751B consists of two PWM control circuits. Two PWM controllers is independent each other. It is low cost in many applications.
DIP-16
FEATURES
* Switch frequency: 400KHz * ISINK =400mA * Wide work voltage * Programmable dead-time control * UVLO protection * SCP protection * Lower static supply current
SSOP-16(150mil)
*Pb-free plating product number: U9751BL
APPLICATION
* DC/DC converters for video cameras backlight inverter and notebook computers etc.
ORDER INFORMATION
Order Number Normal Lead Free Plating U9751B-D16-T U9751BL-D16-T U9751B-S16-R U9751BL-S16-R U9751B-S16-T U9751BL-S16-T U9751B-R16-R U9751BL-R16-R U9751B-R16-T U9751BL-R16-T Package DIP-16 SOP-16 SOP-16 SSOP-16 SSOP-16 Packing Tube Tape Reel Tube Tape Reel Tube
U9751BL-D16-R (1)Packing Type (2)Package Type (3)Lead Plating (1) R: Tape Reel, T: Tube (2) D16: DIP-16, S16: SOP-16, R16: SSOP-16 (3) L: Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd
1 of 6
QW-R103-034,A
U9751B
PIN CONFIGURATION
CT RT EA1+ EA1FB1 DTC1 OUT1 GND 1 2 3 4 5 6 7 8
LINEAR INTEGRATED CIRCUIT
16 15 14 13 12 11 10 9
VREF SCP EA2+ EA2FB2 DTC2 OUT2 VCC
PIN DESCRIPTION
NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NAME CT RT EA1+ EA1FB1 DTC1 OUT1 GND VCC OUT2 DTC2 FB2 EA2EA2+ SCP VREF DESCRIPTION Capacitor connected to the pin controlling Oscillator frequency Resistor connected to the pin controlling Oscillator frequency Error Amplifier 1 positive Input Error Amplifier 1 Inverting Input Error Amplifier 1 Output, used for feedback output 1 Dead-Time Comparator Output 1 Output 1 Ground Power Supply Output 2 Dead-Time Comparator Output 2 Error Amplifier 2 Output, used for feedback output 2 Error Amplifier 2 Inverting Input Error Amplifier 2 positive Input Short Circuit Protection Input Internal 2.5V Reference Voltage
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R103-034,A
U9751B
BLOCK DIAGRAM
12
LINEAR INTEGRATED CIRCUIT
16
15
14
13
11
10
9
Iscp R S PWM COMP
UVLO Shutdown
+ +
Oscillator
1
2
3
4
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
+ 1.2V VREF PWM COMP + -
Reference Voltage
5
6
7
8
3 of 6
QW-R103-034,A
U9751B
ABSOLUTE MAXIMUM RATINGS
LINEAR INTEGRATED CIRCUIT
PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC +38 V Differential Input Voltage VI(DIFF) +20 V Output Voltage VOUT +38 V Output Current IOUT +450 mA Maximum Junction Temperature TJ +150 Operating Temperature TOPR -20 ~ +85 Storage Temperature TSTG -55 ~ +150 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.
DC ELECTRONIC CHARACTERISTICS
VCC=6V, f=200kHz (unless otherwise specified) PARAMETER SYMBOL Reference section Internal Reference Voltage VREF VREF Regulation with VCC VREF VREF Regulation with IO(REF) VREF VREF Regulation with Temperature Short-Circuit Output Current IO(SC) Undervoltage Lockout Section threshold Voltage(VCC) VTHR Short-Circuit Protection Control Section SCP Input Threshold Voltage VI(THR) SCP Comparator Threshold Voltage VCOM(THR) SCP Standby Voltage VSTN-BY SCP Latched Input voltage VI(LTH) Input (Source) Current II(SOURCE) Oscillator Section Frequency f Deviation of Frequency f Frequency Regulation with Voltage f/ V Frequency Regulation with Temperature Dead-time control section Latched Input Voltage Input Threshold Voltage at f=10kHZ Input Bias Current Latch Mode (Source) Current Error-Amplifier Section Input Offset Voltage Common-Mode Input Voltage Range Positive Output Voltage Swing Negative Output Voltage Swing Input Offset Current f/ T TEST CONDITIONS IOUT =1mA VCC =3.6V ~ 40V IOUT = 0.1mA to 1mA TA=-20 ~ 25 TA=25 ~ 85 VOUT =0 IO(REF) = 0.1mA,TA=25 TA= 25 No pull-up No pull-up VIN=0.7V, TA=25 CT=220pF, RT=10K CT=220pF, RT=10K VCC=3.6V to 40V TA=-20 25 TA=25 85 IOUR
DTC
MIN 2.40
TYP 2.46 3.5 2 -0.1% -0.2% 22 2.8 1.3 1.26
MAX 2.53
UNIT V mV mV
18 2.5 1.2
1% 1% 30 3.2 1.5 220 200 -2.5
mA V V V mV mV A KHZ
110 77
-1.5 -2.0 400 10% 1% -0.4% -0.2% 1.9 1.75 1.3
2% 2% V
VI(LTH) VI(THR) II(BIAS) ISOURCE VI(OFF) VI(CM) VO(POS) VO(NEG) II(OFF)
=40A
Zero duty cycle Maximum duty cycle TA=25 VO(FB)=1.25V VCC=3.6V to 40 V
1.95 1.45 0.2 -620
2.15 1.7 1
V A A mV V V V nA
0.3 VREF-0.2
6 1.6 1 100
VO(FB)=1.25V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R103-034,A
U9751B
DC ELECTRONIC CHARACTERISTICS(Cont.)
PARAMETER Input Bias Current Output Sink Current Output Source Current Common-Mode Rejection Ratio Open-Loop Voltage Gain Unity-Gain Bandwidth Output Section Output Saturation Voltage Short-Circuit Output Current Off-State Current PWM Comparator Section Input Threshold Voltage at f=10kHz Total Device Standby Supply Current Average Supply Current SYMBOL II(BIAS) IO(SINK) IO(SOURCE) CMRR GVO GBW VO(SAT) IO(SC) IO(OFF) VI(THR) ISTN-BY IAVE
LINEAR INTEGRATED CIRCUIT
TEST CONDITIONS VO(FB)=1.25V VI(DIFF)=-0.1V,VOUT=1.25V VI(DIFF)=0.1V,VOUT =1.25V RF=200K
MIN 1 -45 60 70
TYP 160 4.0 -90 80 80 1.5 0.7 450
MAX 500
UNIT nA mA A dB dB MHZ V mA A V mA mA
IOUT=10mA VOUT =6V VOUT =50V Zero duty cycle Maximum duty cycle Off-state RT =10K 1.75 1.3
1 10
1.95 1.45 1.7 2.0
2.15 1.8
2.6
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 6
QW-R103-034,A
U9751B
TYPICAL APPLICATION
Vin R10 33k R1 33k C3 100uF R2 33k C1 330pF
IC1 CT RT REF SCP FB2 EAINV2 EAOUT 2 DTC2 OUT2 VCC R9 33k C7 0.027uF C5 C20.33uF
LINEAR INTEGRATED CIRCUIT
R4 10k C4
FB1 EAINV1 EAOUT1 DTC1 OUT1 GND
R13 1k R12
C8 Q1
R16 1k
C17 100 uF L2 20uH M1 9435 D1 SCD24 R20 10k 1 % R21 C9 3.3k 1%
Vout1 R25
R3 C6 33k 0.027uF
UTC U9751 B R5
C11
Q2 R11 33 k
R18
C10 220 uF/16 V
R8
C12
R6 10k
R7 10k R15 1k Q3 C14 R17 1k M2 9435
C13 100 uF L3 20uH R22 2k 1%
Vout 2 R24 C16 220 uF/16 V
R14
Q4
R19
D2 SCD24
R23 C15 1.21 k 1%
Typical Application
TIMING WAVEFORM
Error Amplifier Output CT Waveform
Output Waveform (H shutdown)
H L 1.3V
SCP Waveform
0V
SCP Enabel Output
H L
Timing Diagram
UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 6
QW-R103-034,A

▲Up To Search▲

Price & Availability of U9751B-S16-T

	To Download U9751B-S16-T Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .