ROHM BD1601MUV Technical data
Datasheet
4-Channel Charge Pump
White LED Driver with 64
Dimming Steps and 1-wire Serial Interface
BD1601MUV
●General Description
The multi-level brightness control white LED driver not
only ensures efficient boost by automatically changing
the boost rate but also works as a constant current
driver in 64 steps, so that the driving current can be
adjusted finely. This IC is best suited to turn on white
LEDs that require high-accuracy LED brightness
control.
●Features
Built-in parallel LED driver for 4 lamps.
64-step LED current adjusts function.
Inter-LED relative current accuracy: 3% or less
Lighting/dimming control via a single-line digital
control interface.
Automatic transition charge pump type DC/DC
converter (×1,×1.5 and ×2).
High efficiency achieved (90% or more at
maximum).
Various protection functions such as output voltage
protection, over current limiter and thermal shutdown
circuit are mounted.
●Key Specifications
Operating power supply voltage range: 2.7V to 5.5V
LED maximum current: 30mA (Typ.)
Oscillator frequency: 1.0MHz(Typ.)
Quiescent Current: 0.1μA (Typ.)
Operating temperature range: -30℃ to +85℃
●Package W(Typ.) x D(Typ.) x H(Max.)
●Applications
This driver is applicable for various fields such as
mobile phones, portable game machines and white
goods.
VQFN016V3030
3.00mm x 3.00mm x 1.00mm
●Typical Application Circuit
White LED Application (Recommended)
●Pin Configuration [Top View]
C2P
GND
12
C2N
C1N
11
9
10
LED1
13
LED2
14
LED3
LED4
15
16
1
2
3
4
NC
EN
GND
NC
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
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8
7
6
5
C1P
VBAT
VOUT
NC
BD1601MUV
●Absolute Maximum Ratings (Ta=25℃)
Parameter Symbol Ratings Unit
Power supply voltage VMAX 7 V
Operating temperature range Topr -30 to +85 ℃
Storage temperature range Tstg -55 to +150 ℃
Datasheet
Power dissipation Pd 700
(*1) When a glass epoxy substrate (70mm × 70mm × 1.6mm) has been mounted,
this loss will decrease 5.6mW/℃ if Ta is higher than or equal to 25℃.
(*1)
mW
●Recommended Operating Ratings (Ta = -30 to 85℃)
Parameter Symbol Ratings Unit
Operating power supply voltage
Vin 2.7 to 5.5 V
●Electrical Characteristics Unless otherwise noted, Ta = +25℃, VBAT=3.6V
Parameter Symbol
Min. Typ. Max.
Limits
Units Condition
Overall
Quiescent Current Iq - 0.1 1 μA EN=0V
Current Consumption1 I dd1 - 1.0 2.4 mA x1.0 Mode, Except LED current
Current Consumption2 I dd2 - 2.5 3.5 mA x2.0 Mode, Except LED current
Charge Pump
Oscillator frequency fOSC 0.8 1.0 1.2 MHz
Current Source
LED maximum current ILED-max 28.5 30 31.5 mA
LED current accuracy ILED-diff - - 5.0 %
LED current matching
(*1)
ILED-match - 0.5 3.0 %
LED control voltage VLED - 0.2 0.25 V
When LED current 15.5mA setting
and LED terminal voltage 1.0V
When LED current 15.5mA setting
and LED terminal voltage 1.0V
minimum voltage
at LED1 to LED4 pins
Logic control terminal
Low threshold voltage VIL - - 0.4 V
High threshold voltage VIH 1.4 - - V
High level Input current IIH - 0.1 2 μA EN=VBAT
Low level Input current IIL -2 -0.1 - μA EN=0V
Minimum EN High time THI 50 - - ns
Minimum EN Low time TLO 0.05 - 100 μs
EN Off Timeout TOFF - 512 640 μs
(*1) The following expression is used for calculation:
ILED-match={(Imax-Imin)/(Imax+Imin)} × 100
Imax= Current value in a channel with the maximum current value among all channels
Imin=Current value in a channel with the minimum current value among all channels
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BD1601MUV
●Pin Descriptions
Datasheet
Pin No. Pin name In/Out Type
1 NC - - No connect
2 NC - - No connect
3 EN In C ON/OFF and dimming control
4 GND - D GND
5 NC - - No connect
6 VOUT Out A Charge pump output
7 VBAT - A Power supply
8 C1P In/Out A Flying capacitor pin positive (+) side
9 C1N In/Out B Flying capacitor pin negative (-) side
10 C2N In/Out B Fl ying capacitor pin negative ( -) side
11 C2P In/Out A Flying capacitor pin positive (+) side
12 GND - D GND
13 LED1 Out B LED current driver output 1
14 LED2 Out B LED current driver output 2
15 LED3 Out B LED current driver output 3
16 LED4 Out B LED current driver output 4
-
●Pin ESD Type
Type-A
Thermal
PAD
- D
Type-B
Heat radiation PAD of back side
Connect to GND
VBAT Type-C
Function
VBAT
PAD
GND
Type-D
PAD
VBAT
PAD
GND
Figure 1. Pin ESD Type
PAD
GND
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BD1601MUV
VBAT
●Block Diagram
Datasheet
C1N C1P C2N C2P
VOUT
Charge Pump
Mode Control
×1, ×1.5, ×2
Charge pump
Over Voltage
Protect
OSC
EN
Enable/
Brightness
Control
6
TSD
Current
DAC
Vout Control
LED1
LED2
LED3
LED4
GND
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BD1601MUV
●Typical Performance Curves
Figure 2. Circuit Current
(Standby)
Figure 4. Efficiency
(20mA × 4Lights)
Datasheet
Figure 3. Circuit Current
(Operation in × 1.0Mode)
Figure 5. Efficiency
(5mA × 4Lights)
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●Typical Performance Curves - continued
Figure 8. LED Current Characteristics
Figure 6. Efficiency
(15mA × 4 Lights)
(LED current 15.5mA)
Datasheet
Figure 7. Efficiency
(30mA × 4Lights)
Figure 9. LED Current Characteristics
(Differential Linearity error)
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