BD9634GU Datasheet, PDF (14/30 Pages) Rohm – Switching Regulator ICs

BD9634GU
【CH6】
・Function
Boost DC/DC converter with built-in load switch.
This channel enables constant voltage operation and constant voltage operation for protection.
The constant voltage is available with output of 6[V] to 16[V] (TYP).
The load switch turns OFF when XSHDN6 goes LOW (CH6 shutdown) and the timer latch.
FB6
VOUT6
Place a resistance to
change setting voltage
by external.
0.4[V]
0.4[V]
SAW
PRE
DRIVER
MAX.
DUTY
PREV56
VBAT6
LSO6
OUT6
PGND56
VOUT1
VBAT or VOUT1
C2
L1
VOUT6
C1
US1
FB6.1
R1
・Recommended External
Parts name
Value
R1
20[Ω]
C1
4.7[µF]
C2
1[µF]
L1
10[µF]
US1
-
Maker
-
Taiyo Yuden
Taiyo Yuden
sumida
ROHM
Part number
-
EMK212BJ475KG
JMK105BJ105KV
CDRH2D14NP-100NC
US5U1
・Start-up Sequence
VBAT6
2.5[V] to 5.5[V]
PWM/PFM H input voltage
XSHDN6
0[V]
VOUT6
0[V]
H input voltage
≈VBAT[V]
6[V] to16[V]
Discharge by load
ON_delay SOFT
Soft start period
6.0[ms]
・Set Voltage when Fixed Voltage is Driven
When a fixed voltage is driven by internal resistance, it is set to 16V.
It is possible to return in a set voltage by adding external resistance between VOUT6 and FB6.
However, note the resisting pressure of the capacitance of C1 when stepping up the voltage
applying external resistance.
VOUT6  ^{ExternalR  400[kΩ]}  0.4[V]
10[kΩ]
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TSZ22111・15・001
14/26
TSZ02201-0313AA400620-1-2
26.Apr.2016 Rev.001