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PDF BL8519 Data sheet ( Hoja de datos )
| Número de pieza | BL8519 | |
| Descripción | Built-in 2A Power MOSFET Step-down DC-DC Converter | |
| Fabricantes | BELLING | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BL8519 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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BL8519
Built-in 2A Power MOSFET Step-down DC-DC Converter
DESCRIPTION
BL8519 is a current mode PWM step-down
DC-DC converter that has an internal 2A
power switch. It has a wide input voltage
range of 3.6V to 20V, which make it suitable
for regulating a wide variety of power sources.
BL8519 is made up of a PWM control circuit,
a reference voltage unit, an error amplifier, a
protection circuit, Chip Enable circuit, and
under voltage lockout circuit. A low ripple high
efficiency step-down DC-DC converter can be
easily assembled by this IC with minimum
external components: an inductor, a diode,
capacitors and resistors. Desired output
voltage can be achieved by adjusting the
value of external resistors.
The BL8519 has cycle-by-cycle current limit
circuitry; current limiting provides protection
against shorted output. The low current
(<5uA) shutdown provides complete output
disconnect, enabling easy power
management in battery powered systems.
FEATURES
◆ Range of Input Voltage: 3.6V~20V
◆ Built-in 90mΩ Power MOSFET
◆ <5µA Shutdown Current
◆ Oscillation Frequency: 500KHz
◆ High efficiency: 90%
◆ 2.5A Peak Current Limit Cycle by
Cycle
◆ Operating Temperature Range: -40℃
~85℃
◆ Demo Board Available
APPLICATIONS
◆ Power source for portable
communication equipment, cameras,
video instruments such as VCRs,
camcorders.
◆ Power source for battery-powered
equipment.
◆ Power source for household electrical
appliance
TYPICAL APPLICATION
BL8519
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1
1 page  
DEMO BOARD MEASUREMENT
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency vs. Load Current
(VOUT=5V)
500 1000
Load Current(mA)
1500
VIN=6V
VIN=12V
VIN=18V
CE Pin Bias Current vs. CE Pin Voltage
80
70
60
50
40
30
20
10
0
0
3 6 9 12 15
CE Pin Voltage(V)
18
BL8519
6.0
5.5
5.0
4.5
4.0
3.5
0
Load Regulation
(VOUT=5V)
500 1000
Load Current(mA)
1500
VIN=6V
VIN=12V
VIN=18V
Feedback Voltage vs.Supply Voltage
1.30
1.29
1.28
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
5
8 11 14
Supply Voltage(V)
17
Quiesent Current vs. Supply Voltage
(VCE=0V)
4
3
2
1
0
0
3 6 9 12 15
Supply Voltage(V)
18
Supply Current vs. Supply Voltage
(VFB=1.3V,VCE=VIN)
2.5
2.0
1.5
1.0
0.5
0.0
0
3 6 9 12 15
Supply Voltage(V)
18
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5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet BL8519.PDF ] | |
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