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부품번호 | BD8316GWL 기능 |
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기능 | Step-up and inverted 2-channel DC/DC converter | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
전체 23 페이지수
Datasheet
Single-chip Type with Built-in FET Switching Regulator Series
Step-up and inverted
2-channel DC/DC converter
with Built-in Power MOSFET
BD8316GWL
●Description
The BD8316GWL is step-up and inverted 2-channel
switching regulator with integrated internal high-side
MOSFET. With wide input range from 2.5~5.5V ,it
suitable for application of portable item. In addition,The
small package design is ideal for miniaturizing the
power supply.
●Features
■ Wide input voltage range of 2.5V to 5.5 V
■ High frequency operation 1.6MHz
■ Incorporates Nch FET of 230mΩ/22V and Pch
Pow FET of 230mΩ/15V
■ Incorporates Soft Start (4.2msec(typ))and hight
side switch of boost channel
■ Independent ON/OFF signal(STB). Built-in
discharge SW for step up channel
■ Small package UCSP50L1( 1.8mm×1.5mm, 4×
3 grid, 11pin, WLCSP)
■ Circuits protection OCP,SCP,UVLO,TSD
●Important Specifications
■ Input voltage range
2.5~5.5 [V]
■ Output boost voltage Input voltage(max)~18 [V]
■ Output inverted voltage
■ Maximum current
■ Operating frequency
■ Nch FET ON resistance
■ Pch FET ON resistance
■ Standby current
-9.0~-1.0 [V]
1[A](max)
1.6 [MHz] (typ.)
230[mΩ]
230[mΩ]
1[μA](max)
●Package
UCSP50L1 (WLCSP)
1.8mm×1.5mm×0.5mm, 4×3glid,11pin,
●Application
■ LCD battery
■ CCD battery
■ Portable items that are represented by mobile phone
and DSC
●Typical Application Input: 2.5 to 5.5 V, ch1 output: 5.6 V / 200m A, ch2 output:5.6V/200mA
0.1uF/10V
Vin→
2.5~5.5V
4.7uF/10V
EN CH1→
EN CH2→
VREF
VDD
STB1
STB2
GND
NON1
INV2
LX1
DIS1
HS2L
LX2
4.7uH
10kΩ
56kΩ
Vout1: -5.6V/200mA
4.7uF/10V
4.7uH
180kΩ
Vout2: 5.6V/200mA
4.7uF/10V
30kΩ
Fig.1 Application schematic
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
1/20
TSZ02201-0Q1Q0AJ00170-1-2
2012.08.03 Rev. 003
BD8316GWL
Datasheet
●Function blacks description
1.Voltage Reference
This block generates ERROR AMP reference voltage.
The reference voltage of CH1 is 1.0V, The reference voltage of CH2 is 0.8V.
2.UVLO
Circuit for preventing malfunction at low voltage input.
This circuit prevents malfunction at the start of DC/DC converter and low input voltage .The function monitors VCC pin
voltage and if VCC voltage is lower than 2.2V, function turns off all output of FETs and DC/DC converter , and reset the
timer latch of the internal SCP circuit and soft-start circuit.
3.SCP
Short-circuit protection function based on timer latch system.
When the voltage of NON1 pin is higher than 0V or INV2 pin voltage is lower than 0.8V, the internal SCP circuit starts
counting.
SCP circuit detects output of Error AMP. Since internal Error AMP has highly gain as high as 80dB or more, if input
erroramp voltage cross reference voltage ,the output voltage of Error AMP goes high and detects SCP .
The internal counter is in synch with OSC, the latch circuit activates after the counter counts oscillations to turn off DC/DC
converter output (about 40.9 msec ).
To reset the latch circuit, turn off the STB pin once. Then, turn it on again or turn on the power supply voltage again.
4.OSC
This function determine oscillation frequency . Oscillation frequency of DC/DC converter set at 1.6MHz.
5.ERROR AMP
Error amplifier watch output voltage and output PWM control signals.
The internal reference voltage for Error AMP of ch1 is set at 0V.
The internal reference voltage for Error AMP of ch2 is set at 0.8V.
6.Timing Control
Voltage-pulse width converter for controlling output voltage corresponding to input voltage.
Comparing the internal SLOPE waveform with the ERROR AMP output voltage, PWM COMP controls the pulse width
and outputs to the driver.
Max Duties of ch1 and ch2 are set at 86%.
7.SOFT START
Circuit for preventing in-rush current at the start of DC/DC converter by bringing the output voltage.
Soft-start time is in synch with the internal OSC, and the output voltage of the DC/DC converter reaches the set voltage
after about 4.2m sec.
8.OCP
Circuit for preventing malfunction at over current.
Under input current over electrical characteristics , it supply minimum duty to DC/DC converter and IC stop safety by SCP
detected.
9.TSD
Circuit for preventing malfunction at high Temperature .
When it detects an abnormal temperature exceeding Maximum Junction Temperature (Tj=150℃), it turns OFF all Output
FET, and turns OFF DC/DC Comparator Output.
10. ON/OFF
Voltage applied on STB pin to control ON/OFF channel of each channel.
Turned ON when a voltage of 1.5 V or higher is applied and turned OFF when the terminal is open or 0 V is applied.
Incorporates approximately 800 kΩ pull-down resistance.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
4/20
TSZ02201-0Q1Q0AJ00170-1-2
2012.08.03 Rev. 003
4페이지 BD8316GWL
●Reference data
(unless otherwise specified Ta=25℃, VCC=3.6V)
1.030
1.020
1.010
1.000
VCC=2.5V VCC=3.6V
VCC=5.5V
0.990
0.980
0.970
-50
TEMPERATURE[℃]
0 50 100
Fig.4 VREF vs temp
150
Datasheet
0.850
0.840
0.830
0.820
0.810
0.800
0.790
0.780
VCC=2.5V
VCC=3.6V
0.770
VCC=5.5V
0.760
0.750
-50
TEMPERATURE[℃]
0 50 100
Fig.5 INV2 threshold vs temp
150
1.700
1.600
1.500
VCC=5.5V
VCC=3.6V
VCC=2.5V
1.400
1.300
0
24
VCC[V]
6
8
Fig.6 Oscillation frequency vs temp
2.400
2.300
2.200
2.100
Detect threshold
Reset threshold
2.000
-50
0 50 100
TEMPERATURE[℃]
150
Fig.7 UVLO detect threshold
Vs temp
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
7/20
TSZ02201-0Q1Q0AJ00170-1-2
2012.08.03 Rev. 003
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부품번호 | 상세설명 및 기능 | 제조사 |
BD8316GWL | Step-up and inverted 2-channel DC/DC converter | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |