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PDF BD8150KVT Data sheet ( Hoja de datos )
| Número de pieza | BD8150KVT | |
| Descripción | 4-channel System Power Supply + Gamma Buffer Amp IC | |
| Fabricantes | ROHM Semiconductor | |
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Power Supply IC Series for TFT-LCD Panels
4-channel System Power Supply
+ Gamma Buffer Amp IC
BD8150KVT
No.09035EBT03
●Description
The BD8150KVT is a system power supply IC that offers a 4-channel power supply with 10 gamma correction output channels
and VCOM. The DC/DC block can be switched between step-up and step-down and supports both 5V and 12V input.
●Features
1) Multi-channel power supply with two DC/DC converter controller channels and two charge pump channels
2) 10channel gamma correction Buffer Amp output and 1channel VCOM
3) High reference voltage accuracy: ±1 %
4) Oscillating frequency: 1MHz
5) Built-in UVLO (Under Voltage Lockout) and output short-circuit protection circuits
6) Standby current of 0μA (Typ.)
7) Controllable start up sequence
8) TQFP64V package
●Applications
Power supply for LCD monitors and LCD TVs
●Absolute Maximum Ratings (Ta=25°C)
Parameter
Symbol
Rating
Power supply voltage VCC 15
Regulator power supply voltage
REGVCC
15
Driver power supply voltage
PVCC
15
Junction temperature
Power dissipation
Tjmax
Pd
125
1000*1
Operating temperature range
Topr
−30 to 85
Storage temperature range
Tstg
−55 to 150
*1 Derated at 10mW/°C at Ta>25°C when mounted on a 70.0 mm 70.0 mm 1.6 mm glass epoxy board
Unit
V
V
V
°C
mW
°C
°C
●Operating Conditions (Ta=-30°C ~+85°C)
Parameter
Symbol
Power supply voltage
Regulator power supply voltage
Driver power supply voltage
VCC
REGVCC
PVCC
Limits
Min. Max.
2.7 13
4.5 14
2.7 13
Unit
V
V
V
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
1/18
2009.07 - Rev.B
1 page  
BD8150KVT
●Electrical Characteristics Curves (Unless otherwise specified, Ta = 25°C)
150 150
120
125℃
90 25℃
-40℃
60
120
90 125
25℃
60 -40℃
30 30
0
0 4 8 12 16
RegVcc [V]
Fig. 10 Charge Pump
PMOS On Resistance
10
0
0 4 8 12 16
RegVcc [V]
Fig. 11 Charge Pump
NMOS On Resistance
10
7.5 7.5
55
2.5
0
012 345
Vcc [V]
Fig. 13 Detectors 1 to 3
Threshold Voltage
12
2.5
0
0 0.25 0.5 0.75 1
Vcc [V]
Fig. 14 Detector 4
Threshold Voltage
9
6
3
0
-60 -38 -16 6 28 50
IO [mA]
Fig. 16 Buffer Amp
Output current capacity
1V
1μs
|
Fig. 17 Buffer Amp
Slew Rate Waveform
Technical Note
300
240
180
120
125℃
25℃
60
-40℃
0
2 5.5 9 12.5 16
RegVcc [V]
Fig. 12 Charge Pump
Switching Frequency
4
2
0
-2
-4
0
2.8 5.6
8.4 11.2
VIN[V]
Fig. 15 Buffer Amp
Offset Voltage
100 18800
PHASE
1444
60 1088
7272
20 3636
GAIN
00
-20 --3366
--7722
-60 --110088
--114444
-100 --118800
1.E+0 1.E+0 1.E+0 1.E+0 1.E+0 1.E+0 1.E+0
234 5678
f [Hz]
Fig.18 Buffer Amp
Open Loop
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
5/18
2009.07 - Rev.B
5 Page 
BD8150KVT
Technical Note
1-10 When only one channel is used for the DC/DC converter
This IC has built-in detector circuits for detection of output voltage startup. The ENABLE signal changes to High when
all detectors are on, meaning the ENABLE signal (Pin 34) will not switch to High if channels not used by the DC/DC
converter are set to OFF. If there exist channels that are not used, set them as follows so that the ENABLE signal will
be switched to High.
(1) Make the CTL (Pins 63, 64) HIGH (VCC).
(2) Detection is performed on the feedback side, so the INV and NON of unused channels should be shorted.
(3) Connect the SS pin to GND.
1-11 Output short protection circuit
This IC has a built-in timer latch type output short protection function
to prevent damage from overcurrent from the output MOSFET.
Adding capacitance to the SCP pin (Pin 33) allows the delay time
to be set until protection can be provided.
In the event of an output short, a rated current (7μA, Typ.) flows
to the SCP capacitor. When the threshold voltage (1.25V, Typ.) is
attained, a latch is applied and the IC is shut down. The
shutdown is canceled by CTL or turning the power on again. Refer
to Fig. 29 in order to determine the capacitance that will set the
delay time.
The output power transistor damage time varies depending on
the application, so perform evaluations using the actual product
under operating conditions. Furthermore, if not using short
protection, short the SCP pin to GND.
1.00E-01
SCP PIN CAPACITOR vs. SCP TIME
1.00E-02
1.00E-03
1.00E-04
1.00E-05
1.00E-06
1.00E-11
1.00E-10
1.00E-09
1.00E-08
CSCP [F]
1.00E-07
1.00E-06
Fig. 29 SCP Capacitance vs
Short Protection Delay Time
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
11/18
2009.07 - Rev.B
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet BD8150KVT.PDF ] | |
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