BL8516 PDF даташит
Спецификация BL8516 изготовлена «BELLING» и имеет функцию, называемую «1.2A Step-down DC-DC Converter». |
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Детали детали
Номер произв | BL8516 |
Описание | 1.2A Step-down DC-DC Converter |
Производители | BELLING |
логотип |
7 Pages
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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
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PIN DESCRIPTION
Pin No.
Symbol
1 BOOST
2 VIN
3 SW
4 GND
5 FB
6 NC
7 CE
8 NC
BLOCK DIAGRAM
BL8516
Description
Boost Pin
Power Supply Pin
Switching Node: PWM output connection to inductor.
Ground Pin
Pin for Feedback Voltage
Not Connected
Chip Enable Pin (Active with “H”)
Not Connected
ABSOLUTE MAXIMUM RATING
Supply Voltage
Boost Pin Voltage
Boost Pin Above SW Pin
CE Pin Voltage
FB Pin Voltage
Operating Ambient Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
Thermal resistance: ΘJA
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2
25V
35V
25
–0.3V to Vin+0.3V
–0.3V to 6V
–25°C to 85°C
–40°C to 150°C
260°C
150°C/W
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BL8516
ELECTRICAL CHARACTERISTICS
(Test condition is in 25ºC, VIN=12V,VBOOST=17V,unless otherwise noted.)
Symbol
Item
Conditions
Min. Typ.
VUVLO
Under voltage Lockout
3.35
VFB
Feedback Voltage
1.225 1.25
IFB
FB Pin Bias Current
VFB=1.25V
150
IQ
△VFB/△V
△VFB/△T
Quiescent Current
Quiescent Current in
Shutdown
Reference Line
Regulation
Feedback Voltage
Temperature Coefficient
VFB=1.3V
VCE=0V
VIN=5V to 20V
-25℃ ≤ Topt≤ 85℃
2
0.08
±100
FOSC_MAX Oscillator Frequency
VFB=1.1V
1.2
FOSCTH
Frequency Shift
Threshold on FB Pin
FSW=700K
0.44
DMAX
Max Duty Cycle
88
ILIMIT
Switch Current Limit
VIN=10V
2.5
VCESAT
Switch Saturation
Voltage
ISW=300mA
220
ISW Switch Leakage Current
ICEH
CE “H” Input Current
VCE =3V
6.5
ICEL
CE “L” Input Current
VCE = 0V
0.03
VCEH
CE “H” Input Voltage
VIN = 12V
1.8
VCEL
CE “L” Input Voltage
VIN = 12V
Max.
3.6
1.275
600
2
350
1
15
0.1
0.4
Unit
V
V
nA
mA
uA
%/V
ppm/℃
MHz
V
%
A
mV
uA
μA
μA
V
V
TYPICAL APPLICATION
CE
VIN
L1
C3
D3
C1
D1
BOOST
VIN
SW
GND
NC
CE
NC
FB
U1
VOUT
R1
C2
R2
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