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Datasheet
PFC Direct current resonance type
White LED Driver for Large LCD
BD92111F
General Description
BD92111F is a current resonance type LED Driver with
frequency-controlled LED current. It can connect to PFC
directly and can use half-bridge structure reducing the
number of external components.
It incorporates some protection functions against fault
conditions such as Over-Voltage Protection and LED
Open Detection (IS Low Detection).
Features
20V High Rating Process
1 Channel Push-pull Control
Current and Voltage Feedback by Driving
Frequency
Adjustable Soft Start
Adjustable Timer Latch
Under-Voltage Detection for IC’s Power Line
Output Over-Voltage Protection
Output Error Signal from FAIL Terminal
Shift to Save Mode by STB Terminal
Burst Control by External PWM Signal
Key Specifications
Operating Power Supply Voltage Range:
8.0V to 18.0V
Minimum Oscillator Frequency:
65.8kHz
(RRT=22kΩ,RADJ=36kΩ,VFB=3.2V)
Operating Current:
2.3mA (Typ)
Operating Temperature Range: -40°C to +85°C
Package
SOP18
W(Typ) x D(Typ) x H(Max)
11.20mm x 7.80mm x 2.01mm
Pin pitch 1.27mm
Applications
TV, Computer Display, LCD Backlighting.
Typical Application Circuit
VCC
GND
PDIM
STB
PWM
GND
ERR
VCC
PDIM
ON/OFF
PWMIN
FAIL
< Primary Side >
PVIN
GND
T1
Figure. 1 SOP18
CSS CSDON
RADJ
CFBV S
CFBIS
RRT
RFBV S
RFBIS
CCP
RS
< Secondary Side >
Figure. 2 Typical Application Circuit(s)
Product structure : Silicon monolithic integrated circuit
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BD92111F
Contents
General Description....................................................................................................................................................1
Features .......................................................................................................................................................................1
Applications ................................................................................................................................................................1
Key Specifications ......................................................................................................................................................1
Package .......................................................................................................................................................................1
Typical Application Circuit.........................................................................................................................................1
Absolute Maximum Ratings.......................................................................................................................................3
Recommended Operating Conditions ......................................................................................................................3
External Components Recommended Range..........................................................................................................3
Pin Configuration........................................................................................................................................................3
Physical Dimension and Marking Diagram ..............................................................................................................3
Electrical Characteristics...........................................................................................................................................4
Pin Description............................................................................................................................................................6
I/O Equivalent Circuits................................................................................................................................................7
Block Diagram.............................................................................................................................................................8
Typical Performance Curves .....................................................................................................................................9
Pin Function Description .........................................................................................................................................10
Detection Condition List of the Protection Functions ..........................................................................................15
Behavior List of the Protect Function ....................................................................................................................15
Application Example ................................................................................................................................................16
Timing Chart..............................................................................................................................................................17
Operational Notes .....................................................................................................................................................20
Ordering Information ................................................................................................................................................22
Marking Diagrams.....................................................................................................................................................22
Physical Dimension, Tape and Reel Information...................................................................................................23
Revision History .......................................................................................................................................................24
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BD92111F
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Symbol
Rating
Unit
Supply Voltage
STB, N2, N1
Terminal Voltage
RT,FB,IS,VS,PWMCMP,CP,
PWMIN,SS,FAIL,COMP,SDON,
COMPSD Terminal Voltage
Power Dissipation
VCC
VSTB,VN2,VN1
VRT,VFB,VIS,VVS,VPWMCMP,
VCP,VPWMIN,VADIM,VSS,
VFAIL,VCOMP,VSDON,VCOMPSD
Pd
20
20
5.5
0.69 (Note 1)
V
V
V
W
Operating Temperature Range
Topr
-40 to +85
°C
Junction Temperature
Tjmax
150 °C
Storage Temperature Range
Tstg
-55 to +150
°C
(Note 1) Derating in done 5.5 mW/°C for operating above Ta≥25°C (Mount on 1-layer 70.0mm x 70.0mm x 1.6mm board)
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over
the absolute maximum ratings.
Recommended Operating Conditions (Ta= -40°C to +85°C)
Parameter
Symbol
Power Supply Voltage
VCC
PWMIN Input Frequency Range
fPWMIN
Oscillation Frequency
fOUT
Range
8.0 to 18.0
60 to 500
30 to 200
Unit
V
Hz
kHz
External Components Recommended Range (Ta= -40°C to +85°C)
Parameter
Symbol
Range
Unit
RT Connection Resistance
RRT
24 to 160
kΩ
Set up Resistance for operation
frequency range
RADJ
51 OPEN
kΩ
CP Connection Capacitance
CCP
0.01 to 2.2 (Note 2)
µF
SS Connection Capacitance
CSS
0.01 to 0.1 (Note 2)
µF
SDON Connection Capacitance
CSDON
0.01 to 2.2 (Note 2)
µF
(Note 2) Please set connection capacitance above Min value of Recommended Range according to temperature characteristic and DC bias characteristic.
Pin Configuration
Physical Dimension and Marking Diagram
(Max 11.55 (include.BURR))
Product Name
BD92111F
BD92111F
(TOP VIEW)
Figure. 3 Pin Configuration
Lot No.
(UNIT : mm)
PKG : SOP18
Drawing No. : EX115-5001
SOP18(Unit:mm)
Figure. 4 Physical Dimension and Marking Diagram
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BD92111F
Electrical Characteristics (Unless otherwise specified Ta=25°C, VCC=12V)
Parameter
Symbol
Limit
Min Typ Max
Whole Device
Circuit Current
ICC1 2.3 5.0
Circuit Current at Stand-by
STB Block
STB Pin High Voltage
STB Pin Low Voltage
VCC UVLO Block
VCC Operation Voltage
VCC UVLO Hysteresis
OSC Block
RT Terminal voltage
PWMIN Block
PWMIN Pin High Voltage
PWMIN Pin Low Voltage
Soft Start Block
Setting Current for Soft Start Timer
Soft Start Ended Voltage
Feed Back Block
IS Threshold Voltage
VS Threshold Voltage
IS Source Current 1
IS Source Current 2
VS Source Voltage
IS COMP Detection Voltage
ICC2
VSTH
VSTL
VVCCUVP
VVCCUVP
VRT
VPWMINH
VPWMINL
ISS
VSSEND
VIS
VVS
IIS1
IIS2
IVS
VISCOMP
2.0
-0.3
6.17
0.37
1.05
0
6.50
0.50
1.50
20
VCC
+0.8
6.83
0.63
1.95
2.0 - 5.0
-0.3 - +0.8
1.5
2.8
1.225
1.212
40
0.606
2.0 2.5
3.0 3.2
1.250
1.250
50
0.625
1.275
1.288
0.9
60
0.9
0.644
Unit Conditions
mA
fOUT=60kHz,
VPWMCOMP=0V
µA VSTB=0V
V System ON
V System OFF
V
V
V
V
V
µA
V
V
V
µA VPWMIN=2.5V
µA VPWMIN=0V, VIS=1.0V
µA
V
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BD92111F
Electrical Characteristics continued (Unless otherwise specified Ta=25°C, VCC= 12V)
Parameter
Symbol
Limit
Min Typ
Min Unit
Output Block
N1 Output Sink Resistance
N1Output Source Resistance
N2 Output Sink Resistance
N2 Output Source Resistance
MAX DUTY
RN1SI
RN1SO
RN2SI
RN2SO
MAX DUTY
1.5
4.5
1.5
4.5
43.0
3.0 6.0 Ω
9.0 18.0 Ω
3.0 6.0 Ω
9.0 18.0 Ω
45.0 47.0 %
N1-N2,N2-N1Dead Time
Output Frequency
(minimum frequency setting)
tOFF
fOUTMIN
100 200 400 ns
59.3 65.8 72.3 kHz
Timer Block
Setting Voltage for CP Time
Setting Current for CP Time
VCP 1.90 2.00 2.10 V
ICP 0.85 1.00 1.15 µA
COMP Block
Over voltage Detection level of
COMP
VCOMP
3.88 4.00 4.12 V
Hysteresis width (COMP)
COMPSD Detection Voltage
VCOMP
VCOMPSD
0.15
3.88
0.20 0.25 V
4.00 4.12 V
FAIL Block
FAIL Pin ON-Resistance
RFAIL
- 100 200 Ω
Conditions
fOUT=60kHz
RRT=22,RADJ=36,
VFB=3.2V
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TSZ22111 15 001
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TSZ02201-0F5F0C100090-1-2
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