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BD6079GWL 데이터시트 PDF




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부품번호 BD6079GWL 기능
기능 White LEDs Driver
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BD6079GWL 데이터시트, 핀배열, 회로
Datasheet
White LEDs Driver
for up to 2LEDs in series, 5 strings
BD6079GWL
General Description
BD6079GWL is a boost-up DC/DC type white LED driver
IC with synchronous rectification that can drive up to 10
LEDs, arranged in 1-5 strings of 2LEDs in Series, with
string LED Cathodes connected to GND.
With synchronous rectification (no external schottky diode
required) and small package, it is possible to save mount
space.
The brightness of LED can be adjusted by using PWM
pulse on EN pin. (PWM Frequency :100Hz~1600Hz)
LED current is set by resistance at ISET terminal.
Key Specification
Power supply voltage range:
Quiescent Current:
Switching frequency
Operating temperature range
2.3V to 5.5V
0.4µA (Typ.)
2MHz(Typ.)
-30°C to +85°C
Features
Synchronous rectification Boost type DC/DC
converter
No external schottky diode required
1-5 strings of 2 white LEDs in series
Boost function with 1 wire
Brightness adjustment by external PWM pulse
High Efficiency (87.8%(Typ.) at 115mA)
High accuracy & good matching current driver
Rich safety functions
Over-voltage protection
Output short protection
Inductor Over Current Limit
LED open/short protection
Under voltage lockout
Thermal shutdown
Typical Application Circuit
Package
UCSP50L1
W (Typ.) x D (Typ.) x H (Max.)
1.80mm x 1.40mm x 0.50mm
Application
This LED driver IC is applicable for various fields such as
Backlight for mobile phones, portable game machines,
door phones, audio players, portable DVD players, printer,
etc.
Torchlight and easy flash for camera of mobile phone
Portable equipment
Pin Configuration
1
2
3
Battery
4.7µH(Typ.)
A VIN
ISET
D1
2.2µF
(Typ.)
VIN
PWM
EN
Serial control
NB
SW
VOUT
GND
D1
D2
D3
D4
D5
ISET
Rset
10µF
(Typ.)
ILED
B EN NB D2
C GND
D5
D3
D SW
VOUT
D4
Top View
Figure 1. Typical Application Circuit
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.
1/37
TSZ02201-0G3G0C200340-1-2
14.Mar.2013 Rev.001




BD6079GWL pdf, 반도체, 판매, 대치품
BD6079GWL
Pin Description
PIN name
VIN
In/Out
In
ISET
Out
D1 Out
EN In
NB
D2
GND
D5
D3
SW
VOUT
D4
In
Out
-
Out
Out
In
Out
Out
Datasheet
Ball number
A1
A2
A3
B1
B2
B3
C1
C2
C3
D1
D2
D3
Function
Power supply input, (connect 2.2µF(Typ.) to GND)
Current setting resistor, Connect the resistor to GND.
Resistance value and LED current setting detail are shown in
“ LED Current setting range” on page 20.
LED channel 1 (Connect to LED anode)
Enable control, EN=L: IC shutdown, Internal pull down
When you want to control LED current according to PWM signal.
Please input PWM signal from this pin. Please refer to detail setting
on page 19.
Normal/Boost selectable terminal,
NB=L : normal mode, NB=H : boost mode
Boost mode is controlled with 1wire.
See “boost function” on page 25 for details.
Internal pull down
LED channel 2 (Connect to LED anode)
Ground connection
LED channel 5 (Connect to LED anode)
LED channel 3 (Connect to LED anode)
Switching terminal, connect 4.7μH(Typ.) inductor to Battery
Boost output, connect 10μF(Typ.) to GND
LED channel 4 (Connect to LED anode)
Block Diagram (Typical application)
VIN: 2.3V~4.8V
4.7µH
SW VIN
CIN
2.2µF(6.3V)
LED Driver
Q2
UVLO
Over Voltage
Protect
Thermal
Shutdown
+
-
TSD
+
-
+++++-
LED voltage
PWM Comp.
Selector
Q1
QS
QR
Control
-
-
+-
++
ERRAMP Diff AMP
Current
Limiter
+
OSC
Current
Set
VOUT
D1
D2
D3
D4
D5
GND
EN NB
ISET
Rset
Figure 2. Block Diagram
COUT
10µF(10V)
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
4/37
TSZ02201-0G3G0C200340-1-2
14.Mar.2013 Rev.001

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BD6079GWL 전자부품, 판매, 대치품
BD6079GWL
Typical Performance curve - continued
Datasheet
Efficiency = (ILED1*VLED1 + ILED2*VLED2 + ILED3*VLED3+ ILED4*VLED4+ ILED5*VLED5) / (VBAT*IBAT)
90
85°C
25°C
85
80
-30°C
90
-30°C
85
25°C
80
75 75 85°C
70
0
20 40 60 80 100 120 140 160
Iout [mA]
Figure 11. Efficiency vs. Iout
(VIN=3.7V)
70
70 80 90 100 110
Iout [mA]
Figure 12. PWM Efficiency vs. Iout
(VIN=3.7V, PWM freq=1.6kHz, Duty=1%)
120
EN
VOUT
VLED1
IVIN
Wakeup=1.2ms(Typ.)
Figure 13. Startup function1 – Initial Boost
(VIN=3.7V)
EN
Startup time = 11ms (Typ.)
VOUT
VLED1
IVIN
Figure 14. Startup function2 – LED ON
(VIN=3.7V)
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 15 001
7/37
TSZ02201-0G3G0C200340-1-2
14.Mar.2013 Rev.001

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부품번호상세설명 및 기능제조사
BD6079GWL

White LEDs Driver

ROHM Semiconductor
ROHM Semiconductor

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