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BD8150KVT PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD8150KVT
기능 4-channel System Power Supply + Gamma Buffer Amp IC
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BD8150KVT 데이터시트, 핀배열, 회로
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




BD8150KVT pdf, 반도체, 판매, 대치품
BD8150KVT
Technical Note
Electrical Characteristics Curves (Unless otherwise specified, Ta = 25°C)
10 1
7.5 -40
25
125
5
2.5
0.8
0.6
0.4
0.2
0
0 4 8 12 16
VVCcCc[[VV]]
Fig. 1 Total Supply Current
1.27
0
0 4 8 12 16
VVCcCc[[VV]]
Fig. 2 Standby Current
10
8
1.26
6
1.25
4
1.24
2
1.23
-40
0
40 80 120
Ta []
Fig. 4 VREG Voltage vs Temperature
6
0
012 345
VPG [V]
Fig. 5 PG Pin Sinking
Current
6
4
4.5
2
0
12525
-40
-2 25
-4
-6
0.75 0.85 0.95 1.05 1.15 1.25
VIN [V]
Fig. 7 Error Amp Offset Voltage
3
1.5
0
01234
TIME [μS]
Fig. 8 Error Amp Slew Rate Waveform
20
15
10
5
0
04
Fig. 3
8 12 16
VENBLE [V]
ENB Pin Current
5
4
3
2
1
0
01 23 45
VPG [V]
Fig. 6 PG Pin Source Current
16
12
8
4
0
0 40 80 120 160
VIoC[Cm[VA]]
Fig. 9 Regulator Output Current Capacity
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
4/18
2009.07 - Rev.B

4페이지










BD8150KVT 전자부품, 판매, 대치품
BD8150KVT
Technical Note
Block Description
VREF
This block outputs a highly accurate reference voltage of 2.5V and has a current capacity of over 1mA. ON/OFF control is
possible using the CTL pin.
ERRAMP
This is an error amp that amplifies and outputs the NON and INV voltage differential. The output pulse duty is determined by the
output FB voltage. When FB is 1.95V or more it is switched OFF, and when 1.45V or less the output NPN Tr is switched ON.
OSC
This block determines the RT and CT switching frequency. The triangular waveform is determined by RT and CT.
Timer latch
This is a protection circuit that detects output short-circuits (when the error amp output is 1V or less). Once activated, the
timer begins charging the SCP terminal capacitance at 7μA. When the SCP voltage is 1.8V or more, the latch is applied
and shutdown begins. Recovery can be accomplished by turning on Vcc and CTL.
PWM/driver
This is a PWM comparator that determines the duty by comparing the error amp output and the oscillator triangular
waveform in order to determine the maximum duty ratio for the DTC. It is turned to OFF when the DTC voltage is 1.95V
and turned ON at 1.45V. Use the VREF resistance division to set the DTC voltage.
UVLO
This is a protective circuit that shuts down the system when the input voltage becomes 2.5V in order to prevent IC
malfunction. A 0.1V hysteresis exists and reset is implemented once the voltage is at least 2.6V.
Soft start
Soft start is activated during startup in order to prevent DC/DC converter inrush current. The delay time depends on the pin
capacitance. The circuit is set to LOW when a protective circuit is triggered. When reset, soft start will once again operate
at startup.
DET
This is a comparator that detects whether each output voltage is output as set. When output as set, High is output to pins
DET1 to DET4. When all of the DET pins are High, the ENABLE pin is set to High.
U/D selector
This selector switches between the step-up DC/DC and step-down DC/DC. Step-down operation is performed for high
input, and step-up operation is performed for low input.
VREF17
A 1.7V reference voltage is output. This is used for the DTC setting. Perform resistance division from this voltage and set
the DTC voltage.
REG
This is the regulator output for the gamma correction setting. Providing gamma correction resistance division under this
regulator makes it possible to obtain a stable gamma correction voltage.
2-bit counter
A charge pump switching frequency is generated from the DC/DC converter frequency. This becomes 1/4 of the DC/DC
converter frequency.
DRV block (DC/DC converter)
This is a driver block that outputs the pulse between Vcc and GND. This directly drives the P-channel FET or N-channel
FET. For step-up, connect the N-channel FET, for step-down, connect the P-channel FET.
DRV (charge pump)
This driver block outputs the pulse between FB and GND. Feedback control is applied to the FB voltage to stabilize the
charge pump. The FB voltage only increases to the Reg Vcc voltage, so the Reg Vcc voltage is the maximum switching
amplitude.
Buffer Amp
This IC has a built-in 10channel buffer amp for gamma correction voltage generation. Using this amp allows generation of
a gamma correction voltage that is input to the source driver.
VCOM
A 1-channel differential input operation amp is built-in for VCOM. Using an external bipolar Tr buffer makes it possible to
generate a VCOM voltage.
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
7/18
2009.07 - Rev.B

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부품번호상세설명 및 기능제조사
BD8150KVT

4-channel System Power Supply + Gamma Buffer Amp IC

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