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BA9741A Datasheet Download - UTC

Номер произв BA9741A
Описание TWO-CHANNEL SWITCHING REGULATOR CONTORLLER
Производители UTC
логотип UTC логотип 



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BA9741A Даташит, Описание, Даташиты
UTCBA9741A LINEAR INTEGRATED CIRCUIT
TWO-CHANNEL SWITCHING
REGULATOR CONTORLLER
DESCRIPTION
The UTC BA9741A is a two-channel switching
regulator controllers that use the PWM method.
It can be used for DC to DC conversion for step-up,
step-down, and inverting. The IC comes in a compact
package, making it ideal for use in portable equipment.
FEATURES
*High-accuracy reference voltage circuit (±1%).
*Time-latch, short-circuit protection circuit.
*Miss-operation prevention circuit for low-voltage input
*Reference voltage with output (2.5V)
*Rest period adjustment is possible over the entire duty
*range.
APPLICATION
*DC/DC converters for video cameras and notebook
computers etc.
SOP-16
TSSOP-16
DIP-16
PIN CONFIGURATIONS
CT 1
RT 2
ERROR NON1 3
AMPLIFIER 1 INV1 4
FB1 5
DT1 6
OUT1 7
GND 8
16 VREF
15 SCP
14 NON2
ERROR
13 INV2 AMPLIFIER 2
12 FB2
11 DT2
10 OUT2
9 Vcc
UTC
UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R103-019,A
Free Datasheet http://www.datasheet4u.com/







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BA9741A Даташит, Описание, Даташиты
UTCBA9741A LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTIONS
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PIN NAME
CT
RT
NON1
INV1
FB1
DT1
OUT1
GND
Vcc
OUT2
DT2
FB2
INV2
NON2
SCP
VREF
FUNCTOIN
External timing capacitor
External timing resistor
Positive input for error amplifier 1
Negative input for error amplifier 1
Error amplifier 1 output
Output 1 dead time/soft start setting
Output 1
Ground
Power supply
Output 2
Output 2 dead time / soft start setting
Error amplifier 2 output
Negative input for error amplifier 2
Positive input for error amplifier 2
Time latch setting
Reference voltage output (2.5V)
BLOCK DIAGRAM
VREF 16 Vref
Vcc
9
Reference
Voltage
CT RT
12
Triangle
Oscillator
NON 1 3
INV 1 4
FB 1 5
NON 2 14
INV 2 13
FB 2 12
SCP 15
+
- Err
Amp 1
+
- Err
Amp 2
+
+
-
Vref
S Timer R
Latch
SCP Comp
Vref
-
+
+ PWM Comp1
-
+
+
PWM Comp2
R
UVLO
Vref
6 11
DT1 DT2
8
GND
7 OUT1
10 OUT2
UTC
UNISONIC TECHNOLOGIES CO., LTD. 2
QW-R103-019,A
Free Datasheet http://www.datasheet4u.com/







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BA9741A Даташит, Описание, Даташиты
UTCBA9741A LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS( Ta=25°C )
PARAMETER
SYMBOL
VALUE
Power Supply Voltage
Vcc 36
Power Dissipation (note 1)
SOP-16
DIP-16
Pd
500
650
Operating Temperature
Topr
-40 to 85
Storage Temperature
Tstg -55 to 125
Output Current
Io 120(note 2)
Output Voltage
Vo 36
Note 1: When mounted on 70mm*70mm*1.6mm glass epoxy board.
Reduced by 5.0mW,for each increase in Ta of 1°C over 25°C
Note 2: Should not exceed Pd and ASO values.
UNIT
V
mW
°C
°C
mA
V
RECOMMENDED OPERATING CONDITIONS( Ta=25°C )
PARAMETER
SYMBOL
MIN
TYP.
Power Supply Voltage
Vcc 3.6
6.0
Output Current
Io
Output Voltage
Vo
Error Amplifier Input Voltage
Timing Capacitor
Timing Resistor
Oscillator Frequency
VOM
CCT
RRT
FOSC
0.3
100
5.1
10
MAX
35
100
35
1.6
15000
50
800
UNIT
V
mA
V
V
pF
k
kHz
ELECTRICAL CHARACTERISTICS( TA=25°C ,VCC=6V,UNLESS OTHERWISE NOTED.)
PARAMETER
SYMBOL
TEST CONIDITIONS
MIN TYP. MAX
REFERENCE VOLTAGE BLOCK
Output Voltage
Input Stability
Load Stability
Vref
VDLI
VDLO
Iref =1mA
Vcc =3.6~35V
Iref =0~5mA
2.4 2.5 2.6
1 10
1 10
TRIANGULAR WAVE OSCILLATOR
Oscillation Frequency
Frequency Deviation
Fosc
FDV
RRT=10 k,CCT=220pF
Vcc=3.6~35V
320 400 480
1
PROTECTION CIRCUIT
Threshold Voltage
Standby Voltage
Latch Voltage
Source Current
Comparator Threshold Voltage
VIT
VSTB
VLT
ISCP
VCT
No pull up
No pull up
5Pin,12Pin
1.48 1.64 1.80
50 100
30 100
1.5 2.5 3.5
0.9 1.05 1.2
REST PERIOD ADJUSTMENT CIRCUIT
Input Threshold Voltage
(fosc=10kHz)
Vt0
Vt100
Duty Cycle =0%
Duty Cycle =100%
1.79 1.97 2.15
1.32 1.48 1.64
UNIT
V
mV
mV
kHz
%
V
mV
mV
µA
V
V
V
UTC
UNISONIC TECHNOLOGIES CO., LTD. 3
QW-R103-019,A
Free Datasheet http://www.datasheet4u.com/








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