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BL8530C 데이터시트 PDF




BELLING에서 제조한 전자 부품 BL8530C은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 BL8530C 자료 제공

부품번호 BL8530C 기능
기능 MULTI-FUNTION STEP-UP DC/DC CONTROLLER
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BL8530C 데이터시트, 핀배열, 회로
BL8530C
HIGH EFFICIENCY, LOW SUPPLY CURRENT, MULTI-FUNTION STEP-UP DC/DC CONTROLLER
OUTLINE
The BL8530C series are CMOS-based
PFM step-up DC-DC Controller with low supply
current and high output voltage accuracy.
Quiescent current drawn from power source is
as low as 6uA. It is capable of delivering
500mA output current at 4.0V output with 2V
input Voltage. Only four external components
are necessary: An inductor, a Schottky diode,
an output filter capacitor and a NMOSFET or a
NPN transistor All of these features make
BL8530C series be suitable for the portable
devices, which are supplied by a single battery
to four-cell batteries.
BL8530C has a drive pin (EXT) for
external transistor. So it is possible to load a
large output current with a power transistor
which has a low saturation voltage.
BL8530C integrates stable reference
circuits and trimming technology, so it can
afford high precision and low temperature-drift
coefficient of the output voltage.
BL8530C is available in SOT-23-3 and
SOT-23-5 packages which are PB free. And in
SOT-23-5 the device can be switch on or off
easily by CE pin, to minimize the standby
supply current.
FEATURES
Deliver 500mA at 4.0V Output voltage
with 2V input Voltage
The converter output voltage can be
adjusted from 2.5V 6.0V(In 0.1V step)
Output voltage accuracy -----------±2
Low temperature-drift coefficient of the
output voltage------------------±100ppm/
Only four external components are
necessary: An inductor, a Schottky diode,
an output filter capacitor and a NMOSFET
or a NPN transistor
High power conversion efficiency---90
Low quiescent current drawn from power
source----------------------------------------- 6uA
Small package----- SOT-23-3 SOT-23-5
APPLICATIONS
Power source for PDA DSC MP3
Player electronic toy and wireless mouse
Power source for a single or dual-cell
battery-powered equipments
Power source for LED
SELECTION GUIDE
BL8530C--XX X XX
Package Type
RN SOT-23-5
RM SOT-23-3
Function Description
1 Without Enable circuit
2 With Enable circuit
Output Voltage
25 2.5V
30 3.0V
60
step)
6.0V (In 0.1V
PIN CONFIGURARION
http://www.belling.com.cn
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Total 13 Pages
9/18/2006




BL8530C pdf, 반도체, 판매, 대치품
TYPICAL APPLICATIONS
(1) Application with external NMOSFET
BL8530C
Fig 2
(2) Application with external NPN transistor
Fig 3
Note: R1=330, C1=10nF. (R1 can be calculated by load. If load is light R1’s value can be added.
If load is heavy R1’s value can be smaller. )
DETAILED DESCRIPTION
The BL8530C series are boost structure, voltage-type pulse-frequency modulation(PFM) step-up
DC-DC controller. Only four external components are necessary: an inductor, a schottky diode, an
output filter capacitor and a NMOSFET or a NPN transistor. The step-up DC-DC converter,
constructed by BL8530C, can be adjusted from 2.5V to 6.0V, 0.1V step. By using the depletion
technics, the quiescent current drawn from power source is lower than 8uA. The high efficiency
device consists of resistors for output voltage detection and trimming, a start-up voltage circuit, an
oscillator, a reference circuit, a PFM control circuit, a switch protection circuit and a driver transistor.
BL8530C integrates PFM control system. This system controls fixed power switch on duty cycle
frequency to stabilize output voltage by calculating results of other blocks which sense input voltage,
output voltage, output current and load conditions. In PFM modulation system, the frequency and
pulse width is fixed. The duty cycle is adjusted by skipping pulses, so that switch on-time is changed
based on the conditions such as input voltage, output current and load. The oscillate block inside
BL8530C provides fixed frequency and pulse width wave.
The reference circuit provides stable reference voltage to output stable output voltage. Because
internal trimming technology is used, the chip output change less than ±2%. At the same time the
problem of temperature-drift coefficient of output voltage is considered in design, so
temperature-drift coefficient of output voltage is less than 100ppm/
High-gain differential error amplifier guarantees stable output voltage at difference input voltage
and load. In order to reduce ripple and noise, the error amplifier is designed with high band-with.
http://www.belling.com.cn
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Total 13 Pages
9/18/2006

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BL8530C 전자부품, 판매, 대치품
3 Input Current (no load) test circuit
Fig 5
Fig 6
4 Oscillator frequency and duty cycle test circuit
EXTEND APPLICATIONS
(1) 12V step-up application
Fig 7
BL8530C
http://www.belling.com.cn
Fig 8
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Total 13 Pages
9/18/2006

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관련 데이터시트

부품번호상세설명 및 기능제조사
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PFM STEP-UP DC/DC CONVERTER

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