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BM1513A の電気的特性と機能

BM1513AのメーカーはETCです、この部品の機能は「PWM Control 2-3A Step-Down Converter」です。


製品の詳細 ( Datasheet PDF )

部品番号 BM1513A
部品説明 PWM Control 2-3A Step-Down Converter
メーカ ETC
ロゴ ETC ロゴ 




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BM1513A Datasheet, BM1513A PDF,ピン配置, 機能
PWM Control 2-3A Step-Down Converter
BM1513/A
FEATURES
 Input voltage: 3.6V to 18V.
 Output voltage: 0.8V to VCC.
 BM1513 is 2A ; BM1513A is 3A
 Oscillation frequency: 400KHz
 Soft-start, Current limit, Enable function
 Thermal Shutdown function
 Built-in internal SW P-channel MOS
 replace AP151x series
 SOP-8L Pb-Free Package.
APPLICATIONS
 portable DVD
 LCD Monitor
 Graphic Card
 DVD-Video Player
 Telecom Equipment
 ADSL Modem
 Printer and other Peripheral Equipment
 Microprocessor core supply
 Networking power supply
GENERAL DESCRIPTION
BM1513/A consists of step-down switching
regulator with PWM control. These devices
include a reference voltage source, oscillation
circuit, error amplifier, internal PMOS and etc.
BM1513/A provides low-ripple power, high efficiency
and excellent transient characteristics. The PWM
control circuit is able to very the duty ratio linearly
from 0 up to 100%. This converter also contains
an error amplifier circuit as well as a soft-start
circuit that prevent s overshoot at startup. An
enable function, an over current protect function
and a short circuit protect function are built inside,
and when OCP or SCP happens, the operation
frequency will be reduced from 400KHz to 60KHz.
Also, an internal compensation block is built in to
minimum external component count.
These ICs can function as step-down switching
regulators. They serve as ideal power supply units
for portable devices when coupled with the SOP-8L
mini-package, providing such outstanding features
as low current consumption. Since this converter
can accommodate an input voltage of up to 18V, it
is also ideal when operating via an AC adapter.
PIN ASSIGNMENTS
FB 1
8 Vss
EN 2
OCSET 3
BM1513/A
7 Vss
6 Output
VCC 4
5 Output
PIN DESCRIPTIONS
Name Pin
FB 1
EN 2
OCSET
VCC
3
4
Output 56
VSS 78
Description
Feedback pin.
Power-off pin
H: Normal operation
(Step-down operation)
L: Step-down operation
stopped
(All circuits deactivated)
Add an external resistor to set
max output current.
IC power supply pin
Switch Pin. Connect external
inductor/diode here. Minimize
trace area at this pin to reduce
EMI.
GND Pin
1/7
Free Datasheet http://www.datasheet4u.net/

1 Page





BM1513A pdf, ピン配列
PWM Control 2-3A Step-Down Converter
BM1513
Electrical Characteristics (VIN = 12V, Ta=25°C, unless otherwise specified)
Symbol
Parameter
Conditions
VFB Feedback Voltage
VIN Input voltage
ISW Switch Current (1513/A)
--
--
--
ISSS
Current consumption
during power off
VON/OFF =0V
VOUT
/VOUT Line regulation
VIN = 3.6V~18V
VOUT
/VOUT Load regulation
IOUT = 0 to 2A
fOSC Oscillation frequency
Measure waveform at SW pin
fOSC1
Frequency of current limit or
short circuit protect
Measure waveform at SW pin
VSH Evaluate oscillation at SW pin
VSL
ISH
ISL
IOCSET
TSS
RDSON
EFFI
EN pin input voltage
EN pin input leakage
current
OCSET pin bias current
Soft-Start time
Internal MOSFET Rdson
Efficiency
Evaluate oscillation stop at SW pin
--
--
--
--
--
VIN = 12V, VOUT = 5V
IOUT = 2A
Min.
0.784
3.6
2A/ 3.0
Typ.
0.8
--
--
-- 10
Max.
0.816
18
--
--
Unit
V
V
A
µA
-- 0.6 1 %
-- 0.2 0.5 %
360 400 440 KHz
8 160 16 KHz
2.0
--
--
--
-- V
0.8
-10 -- 10 µA
-10 -- 10 µA
90 100 110 µA
0.3 2
5 ms
- 100 150 m
-- 92 -- %
Typical Application Circuit
VIN Vcc
ROCSET COCSET
OCSET
CVcc
CIN
REN
20K
EN
CEN
0.1µ
BM1513
VSS
Output
FB
CC
Optional
D1
VOUT
RA
+
RB
COUT
Note: VOUT = VFB x (1+RA/RB)
RB=1K~10K ohm
3/7
Free Datasheet http://www.datasheet4u.net/


3Pages


BM1513A 電子部品, 半導体
PWM Control 2-3A Step-Down Converter
BM1513
PWM Control
The BM1513/A consists of DC/DC converters that
employ a pulse-width modulation (PWM) system.
In converters of the BM1513/A, the pulse width
varies in a range from 0 to 100, according to the
load current, and yet ripple voltage produced by
the switching can easily be removed through a
filter because the switching frequency remains
constant. Therefore, these converters provide a
low-ripple power over broad ranges of input
voltage and load current.
Output Voltage Definition
The output voltage is programmed by selection of the
divider R1 and R2. Designer should use resistors R1
and R2 with ±1% tolerance in order to obtain best
accuracy of output voltage. The output voltage can
be calculated from the following formula.
Vout = 0.8 x ( 1 + R1 / R2)
Select a value for R2 between 0.5Kand 10K. The
lower resistor values minimize noise pickup in the
sensitive feedback pin.
Under Voltage Lockout
The under voltage lockout circuit of the BM1513/A
assures that the high-side MOSFET driver outputs
remain in the off state whenever the supply voltage
drops below set parameters. Lockout occurs if VCC
falls below 3.3V. Normal operation resumes once
VCC rises above 3.5V.
8
Recommended resistance value list below:
Vo = 3.3V
Vo = 5.0V
R1 4.7K
6.8K
R2 1.5K
1.3K
Max. Current Limiting
The current limit threshold is setting by connecting
an external resistor from VCC supply to OCSET. The
voltage drop across this resistor is due to the 100uA
internal sink sets the voltage at the pin. When the
PWM voltage is less than the voltage at OCSET, an
over-current condition occurs.
5 Select a value for ROCSET to set the current limit
level by using this formula:
BM1513
Y WW X P
ILOAD = (IOCSET x ROCSET)/ RDSON
In which the RDSON =100 mΩ、IOCSET =100uA, if
the ROCSET =3K then the ILOAD have 3A maximum
transient current.
Note:
BM1513A is fully same as BM1513 , only bigger
current output , BM1513A can replace BM1513
without change anything in external.
6/7
Free Datasheet http://www.datasheet4u.net/

6 Page



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部品番号部品説明メーカ
BM1513

PWM Control 2-3A Step-Down Converter

ETC
ETC
BM1513A

PWM Control 2-3A Step-Down Converter

ETC
ETC


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