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PDF BD2606MVV Datasheet ( Hoja de datos )

Número de pieza BD2606MVV
Descripción 6-Channel Charge Pump White LED Driver
Fabricantes ROHM 
Logotipo ROHM Logotipo
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BD2606MVV datasheet

1 Page

BD2606MVV pdf
BD2606MVV
Typical Performance Curves - continued
100
90 Ta=-30°C
80
70 Ta=25°C
60
50 Ta=85°C
40
30
20
10
0
2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
InpIuntpuVtovlotaltgaeg:eV: VINin[V[V] ]
Figure 5. Efficiency vs Input Voltage
(10mA x 6 Lights)
100
90 Ta=-30°C
80 Ta=25°C
70
60
50 Ta=85°C
40
30
20
10
0
2.5 3 3.5 4 4.5 5 5.5 6 6.5 7
InIpnpuut tVvoollttaagee:: VIiNn[[VV]]
Figure 6. Efficiency vs Input Voltage
(20mA x 6 Lights)
20.0
Ta=25°C
17.5
15.0
12.5
Ta=85°C
10.0
Ta=-30°C
7.5
5.0
2.5
0.0
0.0 0.4 0.8 1.2 1.6
LED Control VolVtaLEgDe[V: ]VLED [V]
2.0
Figure 7. LED Current Characteristics vs
LED Control Voltage
(LED Current 16.5mA)
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
0
Ta=25°C
Ta=-30°C
Ta=85°C
10 20 30 40 50
STATE[DEC]
60
Figure 8. LED Current Characteristics
(Differential Linearity Error)
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
5/16
TSZ02201-0G3G0C200400-1-2
10.Dec.2015 Rev.002

5 Page

BD2606MVV arduino
BD2606MVV
(2) Charge Pump
(a) Description of Operations
Pin voltage comparison takes place at OUT control section, and then VOUT generation takes place so that the LED
cathode voltage with the highest VF is set to 0.1V. A boost rate is changed automatically to a proper one at the
Charge Pump Mode Control section so that operation can take place at possible low boost rate. When the current
taken from the IN pin exceeds 600mA, the overcurrent limiter is activated and the IC resets. In addition, if the
output voltage falls below 1.5V, the IC will reset due to short-circuit at the output.
(b) Soft-Start Function
BD2606MVV has a soft start function that prevents rush current.
EN/LED*
VOUT
ILED
TOFF
Soft Start
Ordinal mode
Figure 14. Soft-Start
(c) Automatic Boost Rate Change
The boost rate automatically switches to the best mode.
(x1 mode x1.5 mode) or (x1.5 mode x2 mode)
If a battery voltage drop occurs, BD2606MVV cannot maintain the LED constant current and then mode
transition begins.
(x1.5 mode x1 mode) or (x2 mode x1.5 mode)
If a battery voltage rise occurs, the output voltage (VOUT) and the supply voltage (VIN) detection are activated
and then mode transition begins.
(3) UVLO (Ultra Low Voltage Lock Out)
If the input voltage falls below 2.2V, BD2606MVV is shut down to prevent malfunction due to ultra-low voltage.
(4) OVP (Over Voltage Protection)
This circuit protects the IC against damage when the C/P output voltage (VOUT) rises extremely for some external
factors.
(5) Thermal Shutdown (TSD)
To protect the IC against thermal damage or heat-driven uncontrolled operations, this circuit turns OFF the output if
the chip temperature rises over 150°C.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
10/16
TSZ02201-0G3G0C200400-1-2
10.Dec.2015 Rev.002

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