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PDF BD65B60GWL Data sheet ( Hoja de datos )
| Número de pieza | BD65B60GWL | |
| Descripción | White LED Driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Max. 28.5V Output 2Strings(25mA/ch)
White LED Driver
BD65B60GWL
●General Description
BD65B60 is a white LED driver IC that integrates PWM
step-up DC/DC converter with boost-capability of up to
maximum 28.5V and current driver with drive capability of up
to 25mA(Typ.) maximum setting. Precise brightness can be
controlled at wide ranges through the external PWM pulse
input.
This IC features highly accurate current drivers with low
differential current errors between channels, thus, reducing
brightness spots on the LCD panel. Moreover, its small
package is suited for saving space.
●Features
High efficiency PWM step-up DC/DC converter
fSW1 = 1.1MHz(Typ.), fSW2 = 0.60MHz(Typ.)
High accuracy & good matching current drivers (2ch)
Soft Start function
Drives up to 8 LEDs in series per channel
Lower input voltage range requirement (2.7V to 5.5V)
●Applications
Backlight for smartphones, games, digital video cameras,
digital single-lens reflexes, digital still cameras, digital photo
frames, Portable DVD player, etc.
●Key Specifications
Input voltage range:
2.7V to 5.5V
Output voltage range:
Max. 28.5V
Operational LED Channel:
2ch or 1ch
Switching frequency:
0.6MHz/1.1MHz(Typ.)
LED Current per Channel:
25mA (Max.)
LED current accuracy:
±3.0% (Max.)
Quiescent current
0μA (Typ.)
Operating temperature range:
-40°C to +85°C
●Package
W(Typ.) x D(Typ.) x H(Max.)
UCSP50L1 (12pin) 1.40mm x 1.80mm x 0.55mm
●Typical Application Circuit
2.7V to 5.5V
CVBAT
10μH
COUT
1.65V to 3.3V
CVIO
Controller
VBAT
SW
VOUT
VIO
SCL BD65B60GWL
SDA
RESET
LED1
LED2
GND ISET
PWM
●Pin Configuration (Bottom View)
D SW VOUT LED2
C GND RESET LED1
B
VBAT PWM
SCL
A ISET VIO SDA
123
RSET
PWMIN
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
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1 page  
BD65B60GWL
Datasheet
●Electrical Characteristics (Unless otherwise specified, VBAT=3.6V, VIO=3.0V, Ta=+25°C)
Parameter
Symbol
Min.
Limits
Typ.
Max.
Unit
Conditions
[Switching Regulator]
LED Control Voltage1
LED Control Voltage2
LED Control Voltage3
LED Control Voltage4
Switching Frequency Accuracy
Duty Cycle Limit
SW Nch FET RON
SW Transistor Leak Current
VOUT Range
[Protection]
Under Voltage Lock Out (fall)
Under Voltage Lock Out (rise)
Over Current Limit 1
Over Current Limit 2
Over Voltage Limit Input1
VLED1
VLED2
VLED3
VLED4
FSW
DMAX
RON
IQSW
VRANGE
0.40
-
-
-
0.88
90.0
-
-
VBAT+1V
VUVLO
VUVLOH
IOcp1
IOcp2
VOVP1
-
-
-
-
29.5
Over Voltage Limit Input2
VOVP2
27
Over Voltage Limit Input3
Over Voltage Limit Hysteresis
Output Short Protect
VOUT Leak Current
LED Terminal
Over Voltage Protect
[Current driver]
LED Maximum Current
Setting Range
LED current Step
LED Current Accuracy 1
LED Current DAC Linearity 1
(Design target )
VOVP3
VOVPhys
VOVPfault
IOVL
VSC
ILMAX
ILEDSTP
ILACCU1
IDALIN1
22.5
-
-
-
4.5
5.0
-
-
-
LED Current DAC Linearity 2
(Design target)
IDALIN2
-
LED Current Matching
LED Current Limit
ILMAT
ILOCP
-
-
0.50
0.40
0.30
0.20
1.10
95.0
0.3
0.1
-
2.1
2.3
1000
1700
31
28
23.5
1
0.2
0.1
5.4
-
256
-
-
-
-
0
0.60
-
-
-
1.32
99.0
-
2.0
OVP-1V
V
V
V
V
MHz
%
Ω
μA
V
ad02h,data=00h
ad02h,data=01h
ad02h,data=02h
ad02h,data=03h
FOSC(ad02h D2)=1
LED1-2=0.3V, Fsw=1.1MHz
ISW=80mA, VBAT=3.6V
RESET =0V, SW=18V
Under OVP voltage
- V VBAT falling edge
- V VBAT rising edge
- mA VBAT=2.7V, ad01h,data=01h *1
- mA VBAT=2.7V, ad01h,data=00h *1
33
VOUT rising edge,
V
ad01h,data=10h
29.5
VOUT rising edge,
V
ad01h,data=01h
24.7
VOUT rising edge,
V
ad01h,data=00h or 11h
-V
0.5 V Detect voltage of VOUT pin
RESET=0V,
1.0 µA
VOUT=18V (OVP=31V)
6.3 V
25.0
-
±3.0
±2.0
±3.0
2.0
0.1
mA
step
%
%
%
%
mA
This value is characteristics of
current driver.
LED1, 2
IMAX=15.0mA
range = 10.02mA to 15mA
RSET resistor =15.0mA setting *2
DAC register :
ad05h, data=AAh to FFh
range = 5.04mA to 9.96mA
RSET resistor =15.0mA setting *2
DAC register :
ad05h, data=55h to A9h
(Max LED current – average
current) / average current
Current Limit Value at ISET
Resistor 1kΩ Setting
LED Leak Current
IQLED
-
0.1
*1 This parameter is tested with DC measurement
*2 condition: RSET resistor = 40kΩ, ILED = 15.0mA setting
calculation: IDALIN1=(ILED(XXh)/ILED(FFh) x 256/(XXh+1)) - 1
1.0
µA RESET=0V, LED1&LED2=18V
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
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3.JUN.2013 Rev.001
5 Page 
BD65B60GWL
●Evaluation Data -continued
Evaluation data is measured using below parts and condition. (Unless otherwise specified)
Coil : 1277AS-H-4R7M
SBD : RB160VA-40
VIO=3.0V
RESET=2.5V
PWM=0V(GND)
Datasheet
0.8
0.7 VBAT=5.5V
0.6
V B A T=3 .6 V
0 .5
V B A T=2 .7V
0.4
0.3
0.2
0.1
0
-40 -15 10
35 60
TEM P (°C)
85
10 0
98
96
V B A T=5.5V
94
92
V B A T=2 .7V
V B A T=3 .6 V
90
-40 -15 10 35 60 85
TEM P (°C)
Figure 21. Switching Frequency (0.6MHz) vs
Temperature
Figure 22. Maximum Duty Cycle Limit vs
Temperature
15
14
V B A T=2 .7V
13
12
V B A T=5.5V
11
V B A T=3 .6 V
10
-40 -15 10 35 60 85
TEM P (°C)
Figure 23. Minimum Duty Cycle Limit vs
Temperature
700
600
500
400
300
200
100
0
-40
V B A T=2 .7V
V B A T=3 .6 V
V B A T=5.5V
-15 10
35 60
85
TEM P (°C)
Figure 24. SW Nch FET RON (at ISW=80mA)
vs Temperature
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/47
TSZ02201-0G3G0C210420-1-2
3.JUN.2013 Rev.001
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD65B60GWL.PDF ] | |
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