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PDF BA9741A Data sheet ( Hoja de datos )
| Número de pieza | BA9741A | |
| Descripción | TWO-CHANNEL SWITCHING REGULATOR CONTORLLER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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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/
1 page  
UTCBA9741A LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTIC CURVES
Figure 2. Reference Voltage vs.Ambient Temperature
2.0
VCC=6V
1.5 Iref = -1mA
1.0
0.5
0
-0.5
-1.0
-1.5
-2.0
-40
-20
0
20 40 60 80 100
Ambient Temperature : Ta (℃)
Figure4. Output Current vs.Output Saturation Voltage
1.2
1.0
0.8
0.6
0.4
0.2
0
0
20 40 60 80 100 120 140
Output Current :Io (mA)
Figure 3. Swing Voltage vs. Frequency
2.2
VCC =6V
RT1=10KΩ
2.0
Upper Voltage
1.8
1.6 Lower Voltage
1.4
1.2
10K
100K
Oscillator Frequency :fosc (Hz)
1M
Figure 5. Error Amplifier AC Gain Characteristic (40dB close)
50
Av
40 180
30
20
10
θ
0
-10
90
0
-20 -90
-30
-40
-50
100
1K 10K 100K
Frequency :f (Hz)
-180
1M
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.
UTC
UNISONIC TECHNOLOGIES CO., LTD. 5
QW-R103-019,A
Free Datasheet http://www.datasheet4u.com/
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet BA9741A.PDF ] | |
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