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BL8042B Datasheet Preview

BL8042B Datasheet

High Efficiency 1.2MHz 28V 2A Step-up DC/DC Converter

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BL8042B
High Efficiency 1.2MHz 28V 2A Step-up DC/DC Converter
DESCRIPTION
The BL8042B is a constant frequency, current
mode step-up converter intended for small, low
power applications. The BL8042B switches at
1.2MHz and allows the use of tiny, low cost
capacitors and inductors 2mm or less in height.
Internal soft-start results in small inrush current
and extends battery life.
The BL8042B includes under-voltage lockout,
current limiting, and thermal overload protection
to prevent damage in the event of an output
overload.
BL8042B is available in SOT23-6 package that is
PB free.
FEATURES
2V to 24V Input Voltage
Up to 28V Output Voltage
Integrated 80mΩ Power MOSFET
1.2MHz Fixed Switching Frequency
Internal 4A Switch Current Limit
Internal Compensation
Thermal Shutdown
Output Adjustable from 0.6V
Available in SOT23-6 Package
APPLICATIONS
ABS Set-Top Boxed
DVB-S/S2
TYPICAL APPLICATION
BL8042B
Figure1. BL8042B Typical Application Circuit
ORDERING INFORMATION
BL8042B 1 2 3
Code
Description
Temperature & Rohs:
1 C: -40~85°C, Pb Free Rohs Std.
Package Type:
2 B6: SOT-23-6
Packing Type:
3 TR: Tape & Reel (Standard)
MARKING INFORMATION
Product Classification
Marking
SDYWI
SD: Product Code
YW: Date Code
BL8042BCB6TR
654
SDYWI
123
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BL8042B Datasheet Preview

BL8042B Datasheet

High Efficiency 1.2MHz 28V 2A Step-up DC/DC Converter

No Preview Available !

BL8042B
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
Symbol
SW
GND
FB
EN
VIN
NC
Description
Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the
power inductor and output rectifier to SW. SW can swing between GND and 28V.
Ground.
Feedback Input. The FB voltage is 0.6V. Connect a resistor divider to FB.
Regulator On/Off Control Input. A high input at EN turns on the converter, and a low
input turns it off. When not used, connect EN to the input supply for automatic
startup.
Power Supply. Must be locally bypassed.
No Connection
ABSOLUTE MAXIMUM RATING
Parameter
VIN, EN Pin Voltage
SW Pin Voltage
All Other Pin Voltage
Junction Temperature (TJ)
Ambient Temperature (TA)
Power Dissipation
Thermal Resistance (θJA)
Thermal Resistance (θJC)
Storage Temperature (Ts)
Lead Temperature & Time
SOT23-6
Value
-0.3V to 26V
-0.3V to 26V
-0.3V to 6V
150C
-40C to 85C
600mW
250C/W
130C/W
-65C to 150C
260C, 10Sec
RECOMMENDED WORK CONDITIONS
Parameter
Input Voltage Range
Output Voltage Range
Operating Junction Temperature(Tj)
Value
2V to 24V
VIN to 28V
-40C 125C
ELECTRICAL CHARACTERISTICS
(Ta=25C, unless otherwise noted)
Symbol
Item
VIN Operating Input Voltage
VFB Feedback Voltage
IFB FB input Bias Current
SW Leakage
IQ Quiescent Current
FSW Oscillator Frequency
DMAX
Maximum Duty Cycle
VEN EN Threshold
SW On-Resistance
ILIMIT Current Limit
Thermal Shutdown
Conditions
VFB=0.6V
VSW=20V
VFB=0.5V, Switch
VEN=0V
VFB=0.75V
VFB=0.7V
VIN=5V, Duty Cycle = 50%
Min.
2
588
-50
Typ. Max. Unit
24 V
600 612 mV
-10 nA
1 uA
0.2 0.4 mA
0.1 1 uA
1.2 MHz
90 %
1V
80 150 mΩ
4A
160 C
www.belling.com.cn
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Part Number BL8042B
Description High Efficiency 1.2MHz 28V 2A Step-up DC/DC Converter
Maker BELLING
Total Page 6 Pages
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