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BD9862MUV-E2

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
Technical Note
4/16
BD9862MUV
www.rohm.com
2010.03 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
●Reference Data(Unless specified Ta=25℃,VCC=2.5V,R
RT
=120kΩ)
40
45
50
55
60
65
70
75
80
85
90
1 10 100
Load current[mA]
efficiency[%]
L=15uH
L=4.7uH
65
70
75
80
85
90
0.1 1 10
Load current[mA]
efficiency[%]
PWM MODE
PWM/PFM MODE
36
38
40
42
44
46
48
50
0.1 1 10
Load current[mA]
efficiency[%]
PWM MODE
PWM/PFM MODE
Fig.1 CH1Current Load to Efficiency
(Vo1=10V)
Fig.2 CH2 Current Load to Efficiency
(VIN2A=3.5V,VIN2B=10V,Vo2=12V)
Fig.3 CH3 Current Load to Efficiency
(VIN3=10V,Vo3=-5V)
3.55
3.56
3.57
3.58
3.59
3.6
0 5 10 15
Load current[mA]
REGOUT voltage[V]
3.500
3.505
3.510
3.515
3.520
3.6 4.0 4.4 4.8 5.2
CPOUT voltage[V]
REGOUT voltage[V]
3.504
3.506
3.508
3.510
3.512
3.514
3.516
3.518
-40 -15 10 35 60 85
Ta[℃]
REGOUT voltage[V]
Fig.4 REGOUT
Output Load Regulation
Fig.5 REGOUT
Output Line Regulation
Fig.6 REGOUT Output Voltage
Temperature Feature
1.002
1.003
1.004
1.005
1.006
-40 -15 10 35 60 85
Ta[℃]
INV1 threshold voltage[V]
1.002
1.003
1.004
1.005
1.006
-40 -15 10 35 60 85
Ta[℃]
INV2 threshold voltage[V]
1.008
1.009
1.010
1.011
1.012
-40 -15 10 35 60 85
Ta[℃]
NON3 threshold voltage[V]
Fig.7 INV1 Threshold Voltage
Temperature Feature
Fig.8 INV2 Threshold Voltage
Temperature Feature
Fig.8 NON3 Threshold Voltage
Temperature Feature
0
10
20
30
40
50
60
70
80
90
100
0.60.811.21.41.61.82
FB1 voltage[V]
Duty[%]
985
990
995
1000
1005
1010
1015
-40 -15 10 35 60 85
Ta[℃]
frequency[kHz]
950
960
970
980
990
1000
1010
1020
1030
1040
1050
2345
VBAT[V]
frequency[kHz]
Fig.10 CH1 FB1Voltage-
On Duty Feature
Fig.11 CH1 Switching Frequency
Temperature Feature
Fig.12 CH1 Switching Frequency
to VBAT Voltage Feature
Technical Note
5/16
BD9862MUV
www.rohm.com
2010.03 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
●Reference data(Unless specified Ta=25℃,VCC=2.5V)
0.955
0.96
0.965
0.97
0.975
0.98
0.985
0.99
0.995
1
1.005
1.01
-40 -15 10 35 60 85
Ta[℃]
soft start time[ms]
4.94
4.96
4.98
5
5.02
5.04
5.06
5.08
-40 -15 10 35 60 85
Ta[℃]
soft start time[ms]
90.3
90.4
90.5
90.6
90.7
90.8
90.9
91
91.1
91.2
-40 -15 10 35 60 85
Ta[℃]
Max duty[%]
Fig.13 CH1
Soft Start Temperature Feature
Fig.14 CH2,CH3
Soft Start Temperature Feature
Fig.15 CH1
Max Duty Temperature Feature
45
45.1
45.2
45.3
45.4
45.5
45.6
45.7
45.8
45.9
46
-40 -15 10 35 60 85
Ta[℃]
Max duty[%]
600
700
800
900
1000
1100
1200
1300
1400
1500
60 80 100 120 140 160 180 200
R
RT
[kOhm]
frequency[kHz]
Fig.16 CH2,CH3
Max Duty Temperature Feature
Fig.17 RT Resistance to CH1
Switching Frequency Feature
●Block Diagram
Step Up
Switching Control
Soft
Start
Error Amp1
+
-
+
-
DRIVER
Max Duty1
SCP
COUNTER
REGOUT
PWM/PFM
Control
Min Duty
PWM
Soft
Start
1.0V
CLK
Error Amp2
+
-
+
-
Max Duty CP
PWM Comp1
PWM Comp2
PWM/PFM
Control
Min Duty PWM
Soft
Start
Error Amp3
+
-
Max Duty CP
PWM Comp3
OSC
1MHz SLOPE
REGOUT
Max Duty1
Max Duty CP
Min Duty
VREF & IREF
VBAT
LDO
CPOUT
× 2
C.P.
VBAT
CPOUTCNCP
VBAT
PFM
Control
+
-
ref2
VBAT
Ring OSC
for startup
CPOUT
TSD
VBAT
VBAT
H：PWM
L：PWM/PFM Auto
INV1
FB1
LX
PGND1
INV2
VIN2A
VIN2B
C2P
C2N
VO2
VIN3
C3P
PGND2
NON3
VREF
UVLOSET
PWM
RT
VBAT
VBAT
REGOUT
REGOUT
SS1 OK
SS3 OK
REGOUT
UVLO:L
GND
DRIVER
PGND2
-
+
+
-
500kHz CLK
1.0V
1.0V
SS1 OK
CLK
+
-
DRIVER
DISCHARGE
CLK Control
Comp
500kHz CLK
1.0V/0.9V
VBAT
VREF
VBAT
1.2V
VBATUVLO
H:IC OFF
L:IC ON
SELECTOR
-
+
+
2.0V
ErrAmpOUT2
ErrAmpOUT3
-
+
0.7V
INV1
SS2 OK
SCPCOMP
SCPOUT
CH1～CH3ドライバー停止
ref1(1.0V)
ref2(1.0V)
SS3 OK
SS2 OK
REGOUTUVLO:L OK
VBATUVLO:L
VBATUVLO:L
1/2 f
CLK
Buffer
REGOUT
UVLO
H:Vout OFF
L:Vout ON
+
1.0V
1.2V
REGOUT
1.2V
Fig.18
CHI-CH3 Driver stop
Technical Note
6/16
BD9862MUV
www.rohm.com
2010.03 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
●Terminal Location Diagram
1 2 3 4 5
6
7
8
9
10
11
12
18 17 16 15 14
13
24
23
22
21
20
19
Fig.19
●Terminal Number and Terminal Name and Function
Terminal
Number
Terminal
Name
Function
1 FB1 Error amplifier output terminal for CH1
2 INV2 Error amplifier inverted input terminal for CH1
3 UVLOSET UVLO Standard voltage terminal
4 VIN3 Reversing charge pump input terminal
5 C3P Reversing charge pump. Flying capacitor H-side input terminal
6 PGND2 Built-in EFT grounding terminal for CH2,3
7 C2N Adding step-up charge pump. Flying capacitor L-side input terminal
8 VIN2A Adding step-up charge pump input terminal
9 VO2 Adding step-up charge pump output terminal
10 C2P Adding step-up charge pump. Flying capacitor H-side input terminal
11 VIN2B Adding step-up charge pump input terminal
12 LX Inductor connecting terminal
13 PGND1 Built-in FET grounding terminal for CHI1
14 CN Start-up charge pump. Flying capacitor L-side input terminal
15 CP Start-up charge pump .Flying capacitor H-side input terminal
16 VBAT Power supply input terminal
17 CPOUT Start-up charge pump output terminal
18 REGOUT Regulator output terminal
19 PWM Charge pump block PWM/PFM switching terminal
20 GND Grounding terminal
21 RT Connecting terminal of resistor for frequency timing setting
22 VREF Standard voltage output terminal
23 NON3 Non-reversing input terminal of error amplifier for CH3
24 INV1 Reversing input terminal of error amplifier for CH1
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

BD9862MUV-E2

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LCD Drivers PWR SUPPLY IC 24PIN
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