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PDF BD9862MUV Data sheet ( Hoja de datos )
| Número de pieza | BD9862MUV | |
| Descripción | 5V Input Multi-channel System Power Supply IC | |
| Fabricantes | ROHM Semiconductor | |
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Power Supply IC Series for TFT-LCD Panels
5V Input Multi-channel
System Power Supply IC
BD9862MUV
No.10035EAT16
●Description
The BD9862MUV is a 3ch system power supply for mobile TFT liquid crystal panels.Operable at VBAT=1.8V, CH2 & CH3
adopts the original PWM/PFM automatic switching control charge pump and realizes high efficiency in full-load range.
●Features
1) Input voltage range: 1.8V~4.5V (The input voltage can be 5.5V if a double charge pump is not used)
2) The step-up switching regulator has a built-in output FET (CH1)
3) There is a built-in PWM/PFM automatic switching charge pump circuit with a fixed PWM terminal (CH2,3)
4) Switching regulator oscillation frequency: MHz(typ.)
5) Charge pump oscillation frequency: 500kHz(typ.)
6) There is a built-in circuit to discontinue output (timer latch type) in the event of overload
7) Package VQFN024V4040
●Applications
Small & medium TFT liquid crystal displays etc.
●Absolute Maximum Ratings (Ta = 25°C)
Parameter
Maximum adding power supply voltage
Maximum adding voltage
Symbol
VBAT
LX
FB1, INV1, INV2, UVLOSET, C2N,
VIN2A, CN, CP, CPOUT, REGOUT,
PWM, RT ,VREF ,NON3
VIN3, C3P, Vo2, C2P, VIN2B
Power dissipation
Pd
Operating temperature range
Topr
Storage Temperature Range
Tstg
Junction temperature
Tjmax
(*1) When used as a stand-alone IC (for Ta=25℃ and over), the value is reduced by 27mW/℃.
(*2) When used for Printed Circuit Boards (glass epoxy board of 74.2mm×74.2mm×1.6mm) mounting
for Ta=25℃ and over, the value is reduced by 5.6mW/℃.
Ratings
-0.3 ~ 7
-0.3 ~ 18
-0.3~7
-0.3~15.5
0.34(*1)
0.70(*2)
-40 ~ +85
-55 ~ +150
+150
Unit
V
V
W
℃
℃
℃
●Operating Conditions(Ta=25℃)
Parameter
Symbol
Ratings
MIN TYP
Power Supply Voltage
VBAT
1.8
-
CH1Output Voltage
Vo1 - -
CH2 Output Voltage
Vo2 - -
CH3 Output Voltage
Starting capacity, adding charge pump
flying capacitor
Reversing capacity charge pump
flying capacitor
Starting charge pump Output capacitance
Vo3
Cflys,Cflya
Cflyi
CCPOUT
-15
0.1
0.022
1.0
-
0.22
0.047
2.0
Switching regulator oscillation frequency
fOSC1
700
1.0
Charge pump oscillation frequency
fOSC2 350 500
CH1 PowerNMOS Drain current
Iidn1 - -
(※1) When using a double charge pump for starting. 5.5V when not using a double charge pump
MAX
4.5(※1)
15
15
-
-
-
-
1.4
700
1.0
Unit condition
V
V
V
V
µF
µF
µF
MHz
kHz
A
CCPOUT≧Cfly*10
RRT=82kΩ~180kΩ
RRT=82kΩ~180kΩ
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/16
2010.03 - Rev.A
1 page  
BD9862MUV
●Reference data(Unless specified Ta=25℃,VCC=2.5V)
1.01
1.005
1
0.995
0.99
0.985
0.98
0.975
0.97
0.965
0.96
0.955
-40 -15 10 35 60 85
Ta[℃]
Fig.13 CH1
Soft Start Temperature Feature
5.08
5.06
5.04
5.02
5
4.98
4.96
4.94
-40 -15 10 35 60 85
Ta[℃]
Fig.14 CH2,CH3
Soft Start Temperature Feature
Technical Note
91.2
91.1
91
90.9
90.8
90.7
90.6
90.5
90.4
90.3
-40 -15 10 35 60 85
Ta[℃]
Fig.15 CH1
Max Duty Temperature Feature
46
45.9
45.8
45.7
45.6
45.5
45.4
45.3
45.2
45.1
45
-40 -15 10 35 60 85
Ta[℃]
Fig.16 CH2,CH3
Max Duty Temperature Feature
1500
1400
1300
1200
1100
1000
900
800
700
600
60
80 100 120 140 160 180 200
R RT [k Ohm ]
Fig.17 RT Resistance to CH1
Switching Frequency Feature
●Block Diagram
CP CN CPOUT
REGOUT
VBAT
RT
GND
PWM
UVLOSET
VBAT
VBAT
500kHz CLK
Ring OSC
for startup
SELECTOR
CPOUT
VBAT
VBAT
PFM CLK
Control
×2
C.P.
-
+
CLK Control
Comp
ref2
CPOUT
LDO
REGOUT
1.2V UVLO
H:Vout OFF
L:Vout ON
500kHz CLK
REGOUT
1MHz SLOPE
OSC
Soft
Start
Error Amp1
1.0V
SS1 OK
PWM Comp1
+
-
Max Duty1
REGOUTUVLO:L OK
REGOUT
Step Up
Switching Control
PWM Comp2
Error Amp2
+
-
PWM/PFM
Control
1.0V Soft
CLK Start SS2 OK
Max Duty CP
Min Duty PWM
SS3 OK
DRIVER
INV1
FB1
LX
PGND1
INV2
VIN2A
C2N
PGND2
VIN2B
VBAT
VBAT REGOUT
TSD
VBATUVLO:L
VREF & IREF
H：PWM
L：PWM/PFM Auto
VBATUVLO:L
1.2V
1.0V
VBAT
-
+
VBATUVLO
H:IC OFF
L:IC ON
1.2V
VBAT
VBAT
VREF
1.0V/0.9V
ref1(1.0V)
ref2(1.0V)
0.7V
INV1
ErrAmpOUT2
ErrAmpOUT3
2.0V
Max Duty1
Max Duty CP
Min Duty
SCPCOMP
1/2 f
DISCHARGE
DRIVER
C2P
VO2
Error Amp3
+
-
PWM Comp3 Max Duty CP
PWM/PFM
Control
Min Duty PWM
DRIVER
VIN3
C3P
PGND2
REGOUT
SCP
COUNTER
SCPOUT
CHC1～HIC-HC3Hド3ライDバrivーe停r s止top
SS2 OK
NON3
REGOUT
UVLO:L
1.0V
CLK
Soft SS3 OK
Start
SS1 OK
Buffer
VREF
Fig.18
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/16
2010.03 - Rev.A
5 Page 
BD9862MUV
Technical Note
●Operating Guidelines
・PWM terminal
At Low the PFM mode skips the pulse of less than 7% On Duty. It is also switched over to the PWM mode if a certain
amount of load is reached or exceeded while in PFM mode. Moreover, it is switched to PFM mode if the load becomes
light. Please set the PWM terminal to High and use as the forced PWM mode if there is an influence of noise created by
modulation of the switching frequency.
・SCP Function
In case of circuit stoppage due to SCP, the protection is released by setting the UVLOSET voltage to L and the VBATT to
OFF.
・CH2 adding charge pump
Please set the Vo2 so that the VIN2A+VIN2B become not more than 15V because the voltage that is the sum of the VIN2A
voltage plus the VIN2B voltage is applied.
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
11/16
2010.03 - Rev.A
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet BD9862MUV.PDF ] | |
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