Flash Driver. BD7757MWX Datasheet

BD7757MWX Driver. Datasheet pdf. Equivalent

BD7757MWX Datasheet
Recommendation BD7757MWX Datasheet
Part BD7757MWX
Description 1.5A LED Camera Flash Driver
Feature BD7757MWX; Datasheet 1.5A LED Camera Flash Driver Synchronous Rectification Step-Up DC/DC BD7757MWX General D.
Manufacture ROHM
Datasheet
Download BD7757MWX Datasheet




ROHM BD7757MWX
Datasheet
1.5A LED Camera Flash Driver
Synchronous Rectification Step-Up DC/DC
BD7757MWX
General Description
The BD7757MWX is a 1.5A Flash LED Driver with
Synchronous rectification step up DC/DC converter that
can drive 1LED. The LED current, timer, and UVLO
threshold can be varied by using UPIC++ (Uni-Port
Interface Control ++).
Features
Synchronous rectification step-up DC/DC converter.
Control of registers via Uni-Port Interface Control ++
(UPIC)
Maximum current of 1.5A in Flash mode
(Low side LED Driver).
Lighting Mode Setup
Flash Mode…1.5A (Max)
Torch Mode…450mA (Max)
Variable LED current
Protection Circuit:
Over Current Protection Circuit (OCP)
Over Voltage Protection Circuit (OVP)
VOUT – GND Short Protection Circuit
LED Short / Open Protection Circuit
Under Voltage Lock Out Circuit (UVLO)
Thermal Shut Down Circuit (TSD)
Battery Drop Protection Circuit
Flash Timer Protection Circuit
Key Specifications
Input Voltage Range :
LED current (FLASH):
LED current (TORCH):
Switching Frequency :
Pch FET On Resistance :
Nch FET On Resistance :
Standby Current at shut down :
Operating Temperature Range:
2.7V to 5.0V
1.5A (Max)
450mA (Max)
2MHz (Typ)
150m(Typ)
100m(Typ)
0μA (Typ)
-30to +85
Package
USON014X3020
W(Typ.) x D(Typ.) x H(Max.)
3.00mm x 2.00mm x 0.60mm
Pin Configuration
Applications
Flash LED Driver for camera and smart phone
DSC, DVC
Video Lighting for Digital Video Applications
Amusement accessory
Typical Application Circuit
Figure 2. Pin Configuration
Figure 1. Application Circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays
1/24
TSZ02201-00F1FC200020-1-2
03.DEC.2014 Rev.004



ROHM BD7757MWX
BD7757MWX
Pin Description
Terminal
No.
1
2
3
Pin Name
AGND
CONTROL1
FL
4 CONTROL2
5 AGND
6 IN
7 PGND
8 OUT
9 NC
10 SW
11 CONTROL3
12 NC
13 PGND
14 RSET
Datasheet
In/ ESD Diode
Out For Power
For GND
Function
--
- Ground
In -
GND
UPIC++ control input
Out -
GND
Flash/Torch current output
In -
GND
Flash ON/OFF terminal.
(Compulsive lighting, even if control1=Low state.
--
In -
--
Out -
--
In -
-
GND
-
GND
-
GND
Output flash current set with initial state at control1=Low state.)
Ground
Power supply
Power ground
DCDC output voltage
No connection
Switching output
Flash ON/OFF terminal.
In -
GND
(Compulsive lighting, even if control1=Low state.
--
--
Out -
-
-
GND
Output flash current set with initial state at control1=Low state.)
No connection
Power ground
The resistor connection terminal of output LED current setting.
Block Diagram
Figure 3. Block Diagram
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/24
TSZ02201-00F1FC200020-1-2
03.DEC.2014 Rev.004



ROHM BD7757MWX
BD7757MWX
Datasheet
Absolute Maximum Ratings
Parameter
Symbol
Input voltage [All Terminal]
VMAX
Power Dissipation
Pd
Operating Temperature Range
Topr
Storage Temperature
Tstg
*1 Derate by 14mW/°C when operating above 25°C (Mount on 2-layer board)
Limit
7
1.75 (*1)
-30 to +85
-55 to +150
Recommended Operating Conditions
Parameter
Supply Voltage
Maximum Output Current in Flash Mode
Maximum Output Current in Torch Mode
Symbol
VIN
IFLED_MAX
ITLED_MAX
Limit
2.7 to 5.0
1.5
450
Electrical Characteristics (Unless otherwise specified, Ta = +25oC, VBAT=3.6V)
Unit
V
W
oC
oC
Unit
V
A
mA
Parameter
Symbol
Logic controller
Low Threshold Voltage
VIL
High Threshold Voltage
CONTROLx=High Input Current
VIH
IFH
CONTROLx=Low Input Current
Control1 High Time
IFL
tHI
Control1 Low Time
Access Available Time
tLO
tACC
Control1 Off Timeout
Latch Time
tOFF
tLAT
Others
Quiescent Current
Current Consumption
SW NMOS On Resistance
SW PMOS On Resistance
Inductor Current Limit
Switching Frequency
Duty Cycle Limit
IQ
IDD1
RONN
RONP
ICOIL
fSW
Duty
Output Voltage Range
Vo
Over Voltage Protection Limit
VOVP
LED Short Threshold Voltage
LED Test Current during LED
Short Protect
Headroom Voltage
Torch LED Current Accuracy
VSTV
ITLED
VHR
IT-DIFF
Flash LED Current Accuracy
UVLO Cancel Voltage
IF-DIFF1
VUVLO
UVLO Hysteresis Voltage
VUVLO_HYS
Min.
-0.3
1.4
-
-1
1
1
-
-
-
-
-
-
-
-
1.6
50
-
-
1.5
1
0.18
-10
-10
2.4
0.2
Typ.
-
-
36
0
-
-
-
-
-
0.1
3.0
0.10
0.15
3
2
80
-
5.4
1.7
2
0.23
0
0
2.5
0.3
Max. Unit
Conditions
0.4 V CONTROL1,2,3
5.2 V CONTROL1,2,3
70 µA CONTROL1,2,3=3.6V
1 µA CONTROL1,2,3=0V
100 µs
100 µs
500 µs
500 µs
1 ms
2.0
-
-
-
-
2.4
-
5.1
5.7
1.9
3
0.28
10
10
2.6
0.4
μA
mA
Ω
Ω
A
MHz
%
V
V
V
ILED=100mA
VIN=3.6V, at 200mA
VOUT=3.6V at 200mA
This parameter is tested in dc
measurement.
VHR=0.0V
VHR=0.0V
(VOUT-VFL) =SWEEP UP
mA VFL=2V
V At step up condition
% ILED=100mA
% ILED=1.0A
V VIN Sweep Up
V VIN Sweep Down
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
3/24
TSZ02201-00F1FC200020-1-2
03.DEC.2014 Rev.004







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