BP5302A [ROHM]
DC / DC converter for LCDs; 直流/直流转换器，用于液晶显示器
| 型号： | BP5302A |
| 厂家： | 
ROHM |
| 描述： | DC / DC converter for LCDs |
| 文件： | 总5页 (文件大小：54K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DC / DC converter for LCDs
BP5302A / BP5302XA
The BP5302A and BP5302XA are DC / DC converters for supplying power to liquid crystal display (LCD) panels.
The modules supply a negative voltage from a positive power supply. They are available in a single in-line
package as an upright (BP5302A) or L-shaped lead (BP5302XA) type.
Applications
LCD panels in personal computers and word processors
Features
1) Wide input voltage range.(+5V to +14V)
2) High accurate output voltage. ( −24±0.75V)
3) High conversion efficiency. (Typ. 80%)
4) Built-in protection circuit.
5) Built-in ON/OFF switch.
6) Compact and light.
7) Available as an upright or L-shaped lead type.
Absolute maximum ratings (Ta=25°C)
Parameter
Input voltage
Symbol
VIN
Limits
15
Unit
V
Operating temperature range
Storage temperature range
Topr
Tstg
0~60
−30~85
°C
°C
Electrical characteristics
(Unless otherwise noted:Ta=25°C, and R1 and R2 resistors in the measurement circuit of Fig.1 are disconnected)
Parameter
Symbol
VIN
Min.
5
Typ.
−
Max.
14
Unit
V
Conditions
Input voltage
Output current
IOUT
VOUT
DV1
DV2
n1
−
−
30
mA
V
Output voltage
−23.25 −24.00 -24.75
VIN=12V, IOUT=20mA
VIN=5~14V, IOUT=20mA
VIN=12V, IOUT=0~20mA
VIN=12V, IOUT=20mA
VIN=12V, IOUT=20mA
VIN=5~14V
Line regulation
−
−
−
−
0.75
0.5
200
-
V
Load regulation
V
Ripple nose voltage
Efficiency
−
−
mVP-P
%
h
70
1.5
−
80
−
ON / OFF CTL votage when ON
VCTL
6.0
0.5
V
−
VCTL
V
VIN=5~14V
ON / OFF CTL votage when OFF
(Alternatively, when OPEN)
ON / OFF CTL current
Current consumption when OFF
R1 resistance
ICTL
IOFF
R1
R2
−
−
−
−
−
−
150
10
∞
µA
µA
kΩ
kΩ
VIN=5~14V, VCTL=5V
VIN=5~14V, VCTL=0V
VIN=5~14V, VCTL=5V
VIN=5~14V, VCTL=5V
50
20
R2 resistance
∞
Measured with a band width of 20MHz.
1/4
BP5302A / BP5302XA
Pin descriptions
Pin No.
Pin name
Function
Output smoothing capacitor connection pin; connect a low-
impedance capacitor with a recommended capacitance of 47µF
between this pin and GND
1
2
3
CO
VOUT
Vref
Output pin
Output voltage adjustment pin for contrast; output voltage is
adjusted by connecting a resistor between pins 2 and 3 or pins
3 and 4
4, 7
8
GND
VCTL
Ground pin
Output ON / OFF control pin; output starts when the pin is
HIGH level, and stops when the pin is LOW or OPEN
Input pin; connect a low-impedance capacitor with a
recommended capacitance of 100µF between this pin and GND
9
VIN
Measurement circuit and Application example
BP5302A / BP5302XA
1
2
3
4
7
8
9
Be sure to use
fuse for safety
VIN
(R1)
(R2)
ON / OFF
SW
VOUT
+
C2
C1
+
VCTL
GND
GND
Fig.1
C1 : 100µF / 16V (Low impedance)
C2 : 47µF / 35V (Low impedance)
R1, R2 : Resistors for adjusting output voltage
(Disconnected during test measurement)
Operation notes
(1) Place I/O external capacitors as near as possible to the connection pins. In particular, make sure to
minimize the impedance between the input-side capacitor (C1) and pin 9. (Reference value: A length less
than 50mm is recommended for a copper foil of 1.0mm wide and 35µF thick.)
(2) Avoid frequent switching using the ON/OFF CTL pin (5 times per second at the maximum).
(3) R1 and R2 resistors, which are used for changing the output voltage, are usually not required.
2/4
BP5302A / BP5302XA
Electrical characteristic curves
−31
−30
−29
−28
−27
−26
−25
−24
−23
−22
−21
−20
−19
−18
−17
−20
VIN=14V
R1 (R2= ∞)
VIN=12V
Io=0mA
−30
VIN=12V
−19
IO=0mA
Ta=60°C
−25
−18
−17
−16
−15
−14
1. R1>50kΩ
R2>20kΩ
R1 2pin − 3pin
R2 3pin − 4pin
2. Note that output voltage decreases with
(
)
−20
increasing output current when the input
voltage VIN is low.
−15
−10
−5
−13
−12
−11
Unusable range
R2 (R1= ∞)
0
10
20
30
100k
1M
10M
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT : IO (mA)
FEED BACK RESISTANCE : R1, R2 (Ω)
FEED BACK RESISTANCE : R2 (kΩ)
Fig.2 Derating curve
Fig.3 Output voltage vs.
Fig.4 Output voltage vs.
Feedback resistance
(R2<100kΩ)
Feedback resistance (R1, R2)
External dimensions (Units : mm)
BP5302A
BP5302XA
6.0 Max.
6.0 Max.
26.0 Max.
26.0 Max.
0.27±0.05
4.5 Min.
8
8
9
Pin No.1
2
3
4
9
Pin No.1
2
3
4
7
7
0.27±0.05
0.5±0.1
1.4±0.2
0.5±0.1
1.4±0.2
Pitch
2.54±0.2
Pitch
2.54±0.2
4.6 Max.
1.4 Max.
4.6 Max.
1.4 Max.
2.9 Max.
2.54×8=20.32
2.9 Max.
2.54×8=20.32
SIP9
SIP9 (L forming)
3/4
Precautions on Use of ROHM Power Module
Safety Precautions
1) The products are designed and produced for application in ordinary electronic equipment (AV equipment,
OA equipment, telecommunication equipment, home appliances, amusement equipment etc.).
If the products are to be used in devices requiring extremely high reliability (medical equipment, transport
equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or operational error may endanger human life
and sufficient fail-safe measures, please consult with the Company's sales staff in advance. If product
malfunctions may result in serious damage, including that to human life, sufficient fail-safe measures
must be taken, including the following:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits in the case of single-circuit failure
2) The products are designed for use in a standard environment and not in any special environments.
Application of the products in a special environment can deteriorate product performance. Accordingly,
verification and confirmation of product performance, prior to use, is recommended if used under the
following conditions:
[a] Use in various types of liquid, including water, oils, chemicals, and organic solvents
[b] Use outdoors where the products are exposed to direct sunlight, or in dusty places
[c] Use in places where the products are exposed to sea winds or corrosive gases, including
Cl2, H2S, NH3, SO2, and NO2
[d] Use in places where the products are exposed to static electricity or electromagnetic waves
[e] Use in proximity to heat-producing components, plastic cords, or othe flammable items
[f] Use involving sealing or coating the products with resin or other coating materials
[g] Use involving unclean solder or use of water or water-soluble cleaning agents for cleaning after
soldering
[h] Use of the products in places subject to dew condensation
3) The products are not radiation resistant.
4) The Company is not responsible for any problems resulting from use of the products under conditions not
recommended herein.
5) The Company should be notified of any product safety issues. Moreover, product safety issues should be
periodically monitored by the customer.
Precautions Regarding Application Example and External Circuits
1) If change is made to the constant of an external circuit, allow a sufficient margin due to variations of the
characteristics of the products and external components, including transient characteristics, as well as
static characteristics. Please be informed that the Company has not conducted investigations on whether
or not particular changes in the application examples or external circuits would result in the infringement
of patent rights of a third party.
2) The application examples, their constants, and other types of information contained herein are applicable
only when the products are used in accordance with standard methods.
Therefore, if mass production is intended, sufficient consideration to external conditions must be made.
Prohibitions Regarding Industrial Property
1) These Specifications contain information related to the Company’s industrial property. Any use of them
other than pertaining to the usage of appropriate products is not permitted. Duplication of these
Specifications and its disclosure to a third party without the Company’s permission is prohibited.
2) Information and data on products, including application examples, contained in these specifications are
simply for reference; the Company does not guarantee any industrial property rights, intellectual property
rights, or any other rights of a third party regarding this information or data. Accordingly, the Company
does not bear any responsibility for:
[a] infringement of the intellectual property rights of a third party
[b] any problems incurred by the use of the products listed herein.
3) The Company prohibits the purchaser of its products to exercise or use the intellectual property rights,
industrial property rights, or any other rights that either belong to or are controlled by the Company, other
than the right to use, sell, or dispose of the products.
4/4
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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