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BD8166EFV PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD8166EFV
기능 12V Input Multi-channel System Power Supply IC
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BD8166EFV 데이터시트, 핀배열, 회로
Power Supply IC Series for TFT-LCD Panels
12V Input Multi-channel
System Power Supply IC
BD8166EFV
No.09035EBT14
Description
The BD8166EFV is a system power supply for the TFT-LCD panels used for liquid crystal TVs.
Incorporates two high-power FETs with low on resistance for large currents that employ high-power packages, thus driving
large current loads while suppressing the generation of heat. A charge pump controller is incorporated as well, thus greatly
reducing the number of application components.
Features
1) Step-up and step-down DC/DC converter
2) Incorporates 2-A N-channel FET.
3) Incorporates positive/negative charge pumps.
4) Incorporates a gate shading function.
5) Input voltage limit: 6 V to 18 V
6) Feedback voltage: 1.25 V ± 1.6%
7) Switching frequency: 500 kHz
8) Protection circuit: Undervoltage lockout protection circuit
Thermal shutdown circuit
Overcurrent protection circuit
Short protection circuit of timer latch type
9) HTSSOP-B40 Package
Applications
Power supply for the TFT-LCD panels used for LCD TVs
Absolute maximum ratings (Ta = 25)
Parameter
Symbol
Limit
Power supply voltage
Vcc, PVCC
19
Vo1 voltage
Vo1 19
Vo2 voltage
Vo2 40
IG Voltage
IGH 7
Maximum junction temperature
Tjmax
150
Power dissipation
Pd 4700*1
Operating temperature range Topr -40 to 85
Storage temperature range
Tstg -55 to 150
* Reduced by 37.6 mW/over 25, when mounted on a glass epoxy 4-layer board (70 mm 70 mm 1.6 mm)
(Copper foil on back 70 mm 70 mm).
Unit
V
V
V
V
mW
Recommended Operating Ranges (Ta = 25)
Parameter
Symbol
Power supply voltage
Vo1 voltage
Vo2 voltage
I G Voltage
SW current
VCC, PVCC
Vo1
Vo2
IGH
SW1, SW2
Limit
Min. Max.
6 18
8 18
— 39
—5
—2
Unit
V
V
V
V
A
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© 2009 ROHM Co., Ltd. All rights reserved.
1/17
2009.07 - Rev.B




BD8166EFV pdf, 반도체, 판매, 대치품
BD81666EFV
Reference Data (Unless otherwise specified, Ta = 25)
86
6 85
25
4
-40
2
0
0 5 10 15 20
SUPPLY VOLTAGE : VCC [V]
Fig.1 Standby Circuit Current 1
85
4 25
2
-40
0
0 5 10 15 20
SUPPLY VOLTAGE : VO1 [V]
Fig.2 Standby Circuit Current 2
4
3
2
-40
1 85
25
0
0 5 10 15 20
SUPPLY VOLT AGE : VCC[V]
Fig.4 Internal Reference
Line Regulation
0.1
0
-0.1 85
-0.2
-0.3
25℃
-0.4
-0.5
0
-40
0.5 1 1.5
FB VOLTAGE : VFB1,2[V]
2
Fig.7 DC/DC Error Amp Input
Bias Current
120
90 85
25
60
-40
30
0
0 0.4 0.8 1.2 1.6
COMP VOLTAGE : VCOMP1[V]
Fig.10 Error Output
Voltage vs Duty
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© 2009 ROHM Co., Ltd. All rights reserved.
4
3
2 85
1
25
-40
0
0 10 20 30 40
VREF29 CURRENT : IREF29[mA]
Fig.5 Internal Reference
Load Regulation
1.6
1.2
0.8
0.4
0
0 5 10 15 20
SUPPLY VOLTAGE : VCC[V]
Fig.8 DC/DC Error Amp
Feedback Voltage
100
10
1
0.1
0.001
0.01
SS3,4 CAPACITOR [μF]
0.1
Fig.11 Delay Start
Capacity vs Delay Time
4/17
Technical Note
60
50
85
40
30
25
-40
20
10
0
0 10 20 30 40
SUPPLY VOLTAGE : VO2[V]
Fig.3 Standby Circuit Current 3
2.9
2.8
2.7
2.6
2.5
--4500 -25 0
25 50 75 100 125
AMBIENT TEMPERATURE : Ta[]
Fig.6 Internal Reference vs
Temperature
100
10
1
0.1
0.01
0.001
0.01 0.1
SS1,2 CAPACITOR [μF]
1
Fig.9 Soft Start Capacity vs
Delay Time
600
550
500
450
400
-50 -25 0 25 50 75 100
AMBIENT TEMPERATURE : Ta []
Fig.12 Switching Frequency vs
Temperature
2009.07 - Rev.B

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BD8166EFV 전자부품, 판매, 대치품
BD81666EFV
Technical Note
Block Operation
VREG
A block to generate constant-voltage for DC/DC boosting.
VREF
A block that generates internal reference voltage of 2.9 V (Typ.).
TSD/UVLO
TSD (Thermal shutdown)/UVLO (Under Voltage Lockout) protection block. The TSD circuit shuts down IC at 175°C (Typ.)
and recovers at 160°C (Typ.). The UVLO circuit shuts down the IC when the Vcc is 5.1 V (Typ.) or below.
Error amp block (ERR)
This is the circuit to compare the reference voltage of 1.25 V (Typ.) and the feedback voltage of output voltage. The COMP
pin voltage resulting from this comparison determines the switching duty. At the time of startup, since the soft start is
operated by the SS pin voltage, the COMP pin voltage is limited to the SS pin voltage.
Oscillator block (OSC)
This block generates the oscillating frequency.
SLOPE block
This block generates the triangular waveform from the clock created by OSC. Generated triangular waveform is sent to the
PWM comparator.
PWM block
The COMP pin voltage output by the error amp is compared to the SLOPE block's triangular waveform to determine the
switching duty. Since the switching duty is limited by the maximum duty ratio which is determined internally, it does not
become 100%.
DRV block
A DC/DC driver block. A signal from the PWM is input to drive the power FETs.
CURRENT SENSE
Current flowing to the power FET is detected by voltage at the CURRENT SENSE and the overcurrent protection operates
at 3A (Typ.). When the overcurrent protection operates, switching is turned OFF and the SS pin capacitance is discharged.
DELAY START
A start delay circuit for positive/negative charge pump.
Soft start circuit
Since the output voltage rises gradually while restricting the current at the time of startup, it is possible to prevent the
output voltage overshoot or the rush current.
Positive charge pump
A controller circuit for the positive-side charge pump. The switching amplitude is controlled so that the feedback voltage
FB2 will be set to 1.25 V (Typ.).
The start delay time can be set in the DLS pin at the time of startup. When the DLS voltage reaches 0.65 V (Typ.),
switching waves will be output from the CL1 and CL2 pins.
Negative charge pump
A controller circuit for the negative-side charge pump. The switching amplitude is controlled so that the feedback voltage
FB3 will be set to 1.25 V (Typ.).
Gate shading controller
A controller circuit of gate shading. The Vo2GS and GSOUT are turned on and off according to IG pin input.
VCOM
A common amplifier to set output voltage in a range of 0.3 V to Vo1-0.3 V.
Timer latch
An output short protection circuit. If at least one output is down after the DC/DC2 and positive/negative charge pump
outputs all rise, all the outputs will be shut down.
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© 2009 ROHM Co., Ltd. All rights reserved.
7/17
2009.07 - Rev.B

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부품번호상세설명 및 기능제조사
BD8166EFV

12V Input Multi-channel System Power Supply IC

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