BD9361GUL Datasheet, PDF (2/27 Pages) Rohm – 6ch Internal Power MOSFET System Switching Regulator + 1ch LDO

BD9361GUL
●Block Diagram
●Pin description
GND(E4) VCCOUT(E5)
No.
Symbol
Description
Vo1
(D5)
Vo2
(D4)
Vo3
(D3)
Vo4
(E2)
INV5
(E3)
1MHz
－
DAC
＋ _{ERROR AMP}
2 line
VCCOUT
Serial I/F
－
CH1 Step up
Current mode
control
＋ OVP COMP
6.35V
1MHz
DAC
2 line
Serial I/F
－
＋ _{ERROR AMP}
－
＋ _{SCP COMP}
CH2 Cross
Converter
control
DAC
2 line
Serial I/F
－
＋ _{ERROR AMP}
－
＋ _{SCP COMP}
DAC
2 line
Serial I/F
－
＋ _{ERROR AMP}
－
＋ _{SCP COMP}
VREF
－
＋ _{ERROR AMP}
－
＋ _{SCP COMP}
2MHz
CH3
Step down
Current mode
control
2MHz
CH4
Step down
Current mode
control
2MHz
CH5
Step down
Current mode
control
－
DAC ^＋ _{ERROR AMP}
2 line
Serial I/F
LDO
IC Power Supply Input in part of controller
E5
HX1 (D6)
Back
gate
control
LX1 (E6)
C5
VCCOUT
VDD
Please connect to HX1 terminal.
Please connect 10uF ceramic capacitor to
this terminal.
Power Supply Input for serial signal.
Please connect 1uF ceramic capacitor to
PGND1 (F6)
this terminal.
E4
GND
Ground terminal
HX2BAT (C6) ^{F6,A6,A1,F1,C1 PGND1,2,3,45,6 Ground for Internal FET}
LX21(B6) D6
HX1
Terminal for output voltage of CH1 (step-up).
Please connect to VCCOUT terminal.
PGND2 (A6)
The power supply to switching regulator is
LX22 (A5) _A3,D1,F3
VOUT2 (A4)
Hx2BAT,HX3,4,5
inputted
supplies
into this
power to
terminal. This
output stage of
terminal
switching
regulator and control circuit.
HX3 (A3)
LX3 (A2)
PGND3 (A1)
E6,A2,E1,F2,B1
A4
B6
Lx1,3,4,5,6
VOUT2
Lx21
Terminal for Connecting Inductor. Please
refer to the 13 page for recommended value.
CH2 DC/DC Output
Terminal for Connecting Inductor
For CH2 Input
HX4 (D1)
A5
LX4 (E1)
Lx22
Terminal for Connecting Inductor
For CH2 Output
Output voltage Feed-back pin
D5,D4,D3,E2
Vo1,2,3,4
Please connect each channel’s output to
Vo1 ～ Vo4 terminals, because CH1 ～ CH4
HX5 (F3)
have built-in feedback resister.
LX5 (F2)
Error Amp Inverted Input
PGND45 (F1) ^E3,D2
INV5,6
Please refer to the 21 page for the
calculation method of feedback resister.
F4
VINREG (F4) _F5
REGOUT (F5) _C3
VINREG
REGOUT
VOUT6
LDO Input terminal
LDO Output terminal
CH6 DC/DC OVP monitor terminal
C2
LED
Terminal for connecting LED Cathode
－
DAC
2 line
Serial I/F
＋
ERROR AMP
1MHz
CH6 Step up
Current mode
control
－
28V
＋ SCP COMP
LED SW
control
C4
LX6 (B1)
PGND6 (C1) ^B4
B3
VOUT6 (C3)
B5
LED (C2)
INV6 (D2)
STB1234
SCL
SDA
VOSEL4
ON/OFF switch
H: operating over 1.5V
2 Line serial clock Input Pin
2 Line serial data Input Pin
CH4 initial Output voltage control pin
(HX2BAT:1.8V,GND:1.5V)
Please regularly connect this terminal to
HX2BAT or GND.
Sequence control terminal
HX2BAT:CH1→CH3→CH4→CH2
SCP
COMPOUT
1～6
SCP
COUNTER
ALL CH
DRIVER STOP
B2
SEQ_CTL GND: CH1→CH4→CH3→CH2
Please regularly connect this terminal to
HX2BAT or GND.
ON/OFF
LOGIC
Serial
I/F
Fig3. Block diagram
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2
TSZ22111・14・001
TSZ02201-0Q2Q0A400010-1-2
2011.12.22 Rev.001