BD6086GU_11 ROHM [Rohm], BD6086GU_11 Datasheet - Page 74

• Manufacturer Part Number: BD6086GU_11
• Description: 13LEDs ALC* Flash and Illumination
• Manufacturer: ROHM [Rohm]

© 2011 ROHM Co., Ltd. All rights reserved.
www.rohm.com
BD6086GU
Mode transition
A step-up (pressure rising) multiple switches automatically depending on the VBAT voltage and VOUT terminal voltage.
The charge pump mode transits as follows.
<Mode transition: x1.0 → x1.5 → x2.0>
<Mode transition: x2.0 → x1.5 → x1.0>
VBAT and VOUT are compared and mode transition is allowed only when the following conditions are satisfied.
VOUT and VBAT rates are detected and mode transition is performed only when a prescribed rate is exceeded.
The rates are as follows:
Where, Ron10 and Ron15 represent a 0n resistance at a charge pump.
Ron10=1Ω (Typ), Ron15=5Ω (Typ) (design value)
Mode transition from x1.0 to x1.5
Mode transition from x1.5 to x2.0
Mode transition from x1.5 to x1.0
Mode transition from x2.0 to x1.5
Condition (1)
VBAT ≤ VOUT + (Ron10×Iout)
(LED terminal feedback: VOUT = Vf+0.2(Typ))
VBAT×1.5 ≤ VOUT + (Ron15×Iout)
(LED terminal feedback: VOUT = Vf+0.2(Typ))
VBAT/VOUT=1.07 (design value)
VBAT/VOUT=0.96 (design value)
mode down=”H”
mode down=”H”
STANDBY
SOFT
X1.0
X2.0
X1.5
(1)
MLEDEN=”1” or W*EN=”1” or RGB*EN or RGB*OS=”1”
Ta<T
After detecting VOUT>1.5V(typ), 128us(typ) wait
mode up=”H”
mode up=”H”
TSD
CP x1.0 mode
CP x1.0 mode
CP x1.5 mode
CP x2.0 mode
and
74/80
ALL off
(However, an LED must be used for LED
light control defined in the VOUT setting.)
Technical Note
2011.04 - Rev.A