|
|
PDF BL8516 Data sheet ( Hoja de datos )
| Número de pieza | BL8516 | |
| Descripción | 1.2A Step-down DC-DC Converter | |
| Fabricantes | BELLING | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de BL8516 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
|
No Preview Available !
DESCRIPTION
BL8516 is a current mode PWM step-down
DC-DC converter, which has an internal 2A
power switch. It has the wide input voltage
range of 3.6V to 20V, so it can suit for
regulating a wide variety of power source.
BL8516 use bipolar technology and make 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
composed of this IC with only several
external components, or an inductor, a diode
and capacitors. Output Voltage can be
adjusted with external resistors.
The BL8516 has the cycle-by-cycle current
limit circuit; current limiting provides
protection against shorted output. The low
current (<1uA) shutdown provides complete
output disconnect, enabling easy power
management in battery powered systems.
BL8516
1.2A Step-down DC-DC Converter
FEATURES
◆ Range of Input Voltage: 3.6V~20V
◆ Built-in NPN switch
◆ <1µA Shutdown Current
◆ Oscillation Frequency: 1.2MHz
◆ High efficiency: 90%
◆ High Accuracy Output Voltage: ± 2%
◆ Low Temperature-Drift Coefficient of
Output Voltage: Type: ± 100ppm/°C
◆ Operating Temperature Range: -40℃
~85℃
◆ Demo Board Available
APPLICATIONS
◆ Power source for hand-held
communication equipment, cameras,
video instruments such as VCRs,
camcorders.
◆ Power source for battery-powered
equipment.
◆ Power source for household electrical
appliance
ORDERING INFORMATION
BL8516 □1 □2 □3
Code
Description
□1
Temperature & Rohs:
C: -40~85°C, Pb Free Rohs Std.
□2
Package Type:
D8: SOP-8
□3
Packing Type:
TR: Tape & Reel (Standard)
PIN CONFIGURATION
Product Classification BL8516CD8TR
Marking
HF XX
YYBZZ
HF: Product
Code
XX: Output
Voltage
Adjustable
YY: LOT NO.
B: FAB Code
ZZ: Date Code
8765
HFXX
YYBZZ
1234
www.belling.com.cn
1
1 page  
Quiescent Current vs. Supply Voltage
3000
2000
1000
0
0 5 10 15
Supply Voltage(V)
20
BL8516
Feedback Voltage vs.Supply Voltage
1.30
1.28
1.26
1.24
1.22
1.20
5
10 15
Supply Voltage(V)
20
Feedback Voltage vs.Temperature
1.30
1.28
1.26
1.24
1.22
1.20
-50
-25
0 25 50
Temperature
75 100
Frequency vs.Temperature
1.30
1.25
1.20
1.15
1.10
1.05
1.00
-50
-25
0 25 50
Temperature(ºC)
75 100
APPLICATION INFORMATION
Inductor Selection and Maximum Output
Current
The duty cycle of the internal switch is:
D = (VOUT + VD)/(VIN – VSW + VD)
In which VD is the forward voltage drop of the
catch diode (D1) and VSW is the voltage drop
of the internal switch. The value of duty cycle
at full load current is of special interest, when
values of VSW and VD can both assumed to
be 0.4V.
Since BL8516 has a maximum guaranteed
duty cycle of 88%, the minimum input voltage
is limited for a particular value of output.
When the switch is off, the voltage drop
across the inductor is equal to output voltage
plus the catch diode drop. Therefore the
peak-to-peak ripple current in the inductor
can be derived:
∆IL = (1 – D)(VOUT + VD)/(L • FOSC)
In which FOSC is the switching frequency
and L is the value of the inductance. The
average inductor current is equal to the
output current and the peak inductor current
is the sum of the output current and one half
of the ripple current:
ILPK = IOUT + ∆IL /2
This current has to be kept below the
maximum allowed switch current (ILIMIT) for
output regulation. Typical values of ILIMIT are
above 2.5A and the maximum output current
is
IOUT (MAX) = ILIMIT – ∆IL/2
If the ripple current is small, then the
available output current is close to the switch
current limit. It is recommended that the
inductor value be chosen such that the peak-
www.belling.com.cn
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet BL8516.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BL8516 | 1.2A Step-down DC-DC Converter | BELLING |
| BL8519 | Built-in 2A Power MOSFET Step-down DC-DC Converter | BELLING |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |