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PDF BD9035AEFV-C Data sheet ( Hoja de datos )
| Número de pieza | BD9035AEFV-C | |
| Descripción | Buck-Boost Switching Regulator | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
Controller type switching regulator with high frequency, high accuracy external FET
Automatically Controlled
Buck-Boost Switching Regulator
BD9035AEFV-C
General Description
The BD9035AEFV-C is a buck-boost switching controller
with a high withstand voltage and a wide input range
(VIN=3.8~30V) capable of generating buck-boost output
with one inductor. The IC has a ±7% high accuracy
switching frequency for the entire operating temperature
range (Ta=-40°C~+125°C). Because of the automatically
controlled buck-boost system the BD9035AEFV-C also
has a higher efficiency compared to regular switching
regulators employing Sepic or H-Bridge systems.
Features
Power supply voltage: 40V (maximum rating)
Automatically controlled buck-boost system.
±7% High accuracy switching frequency
(Ta=-40°C~+125°C).
PLL circuit for external synchronization:
100kHz~600kHz
Two-stage overcurrent protection through one external
resistor
Various protection functions
Undervoltage, overvoltage output detection circuit &
constant output monitor pin (PGOOD)
AEC-Q100 Qualified
Applications
Automotive micro controller, car audio and navigation
system, LCD TV, PDP TV, DVD, PC, etc.
Key Specifications
Input voltage range:
3.8V to 30V
Oscillation frequency:
(Initial startup is over 4.5V)
100kHz to 600kHz
Reference voltage accuracy:
0.8V±1.5%
Circuit current at shutdown:
0μA (Typ.)
Operating temperature range:
-40℃ to +125℃
Package
HTSSOP-B24
W(Typ.) x D(Typ.) x H(Max.)
7.80mm x 7.60mm x 1.00mm
Figure 1. HTSSOP-B24
Typical Application Circuit
Figure 2. Typical application circuit diagram
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed for protection against radioactive rays
1/23
TSZ0 2201-0T1T0AL00110-1-2
19.Feb.2014 Rev.002
1 page  
BD9035AEFV-C
Datasheet
■Overvoltage protection function (OVPH)
In case the OVPLVL pin voltage exceeds 1.25V (Typ.), the soft start pin capacitor is discharged and the output is turned OFF
for 8192clk. During the 8192clk in which the output is turned OFF the logic of OUTH and OUTL pin changes as follows;
OUTH=H and OUTL=H. After the 8192clk the chip returns to normal operations and the soft start pin is recharged.
Figure 6. Overvoltage protection timing chart
■Soft Start
The soft start block provides a function to prevent the overshoot of the output voltage Vo through gradually increasing the
normal rotation input of the error amplifier when power supply turns ON to gradually increase the switching duty. The soft
start time is set by the charge capacity of the soft start pin capacitor. (Refer to P. 17)
■Low voltage lockout circuit (UVLO)
This is a Low Voltage Error Prevention Circuit.
This prevents internal circuit error during increase of Power supply Voltage and during decline of Power supply Voltage.
If the VCC drops below 3.4V (typ.), the UVLO is activated and the circuit is shut down.
■Thermal protection circuit (TSD)
In order to prevent thermal destruction/thermal runaway of this IC, the TSD block will turn OFF the output when the chip
temperature reaches approximately 150℃ or more. When the chip temperature falls to a specified level from thermal
shutdown detection, the output will reset. However, since the TSD is designed to protect the IC, the margin for thermal
design must be provided to guarantee that the chip junction temperature should be less than 150°C, which is the thermal
shutdown detection temperature.
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/23
TSZ02201-0T1T0AL00110-1-2
19.Feb.2014 Rev.002
5 Page 
BD9035AEFV-C
Datasheet
2.10
2.05
2.00
1.95
1.90
1.85
1.80
1.75
1.70
-40
-20 0 20 40 60 80 100
AMBIENT TEMPERATURE : Ta[℃]
Figure 15. EN threshold voltage vs. temperature
characteristics
1.2
1.0
0.8
0.6
0.4
0.2 FB=0V
0.0
-40
-20 0 20 40 60 80
AMBIENT TEMPERATURE : Ta[℃]
100
Figure 16. FB pin bias current vs. temperature
characteristics
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
-40
-20 0 20 40 60 80
AMBIENT TEMPERATURE : Ta[℃]
100
Figure 17. PGOOD pin ON resistance vs.
temperature characteristics
0.90
0.85
0.80
0.75
VOVER
VLOW
0.70
-40 -20 0 20 40 60 80 100 120
AMBIENT TEMPERATURE : Ta[℃]
Figure 18. Output overvoltage / undervoltage
detection voltage vs. temperature characteristics
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/23
TSZ02201-0T1T0AL00110-1-2
19.Feb.2014 Rev.002
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet BD9035AEFV-C.PDF ] | |
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