OB3318 Demo Board Manual

Transcription

(贝
纳
化
电
)
OB3318 CCFL Inverter
On
-B
ri
gh
t
Co
nf
id
en
ti
al
to
Bo
na
Fi
de
Introduction Manual
© On-Bright Electronics
Confidential
OB_DOC_DBM_18A0
-1-
)
Contents
电
Section1: Board Information (page3 to page7)
化
Page3: System function check list & test spec
Page4: Test setup & equipments list
(贝
纳
Page5: System schematic
Page6: Bill of material
Page7: PCB gerber file
Section2: Test report (page8 to page26)
de
Page8: System striking frequency & striking voltage
Fi
Page9: Striking process control and striking timer
Page10: Normal operating frequency & voltage
Page11: Soft start time
na
Page12: Soft on/off time
Bo
Page13: Internal burst mode dimming control (1: Max. brightness)
Page14: Internal burst mode dimming control (2: Medium brightness)
Page15: Internal burst mode dimming control (3: Min. brightness)
to
Page16: Internal analog mode dimming control (1: Max. brightness)
Page17: Internal analog mode dimming control (2: Medium brightness)
ti
al
Page18: Internal analog mode dimming control (3: Min. brightness)
Page19: External LPWM mode dimming control (1: 80% brightness)
Page20: External LPWM mode dimming control (2: 20% brightness)
Page21: MOSFET VGS & Transformer primary terminal waveform
en
Page22: System power voltage ripple (continues mode & burst mode dimming)
id
Page23: System inrush current (continues mode & burst mode dimming)
Page24: Open lamp protection in normal operating condition
nf
Page25: Output current wave crest factor
On
-B
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gh
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Co
Page26: System efficiency
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OB_DOC_DBM_18A0
-2-
Board Information
Item
Check list
电
No.
)
1. System function check list:
化
Main control IC: OB3318 Half bridge
Dimming mode: Burst mode, analog mode, external LPWM mode
Lamp quantity: 100K dummy load X1
Inf.
(贝
纳
A
Input voltage: typical 12V
Result
Operation frequency: 48KHz~52KHz
Burst frequency: 195Hz~205Hz
Turns ratio: 20:2485
de
Endure voltage: 1500V rms 60sec
B
Secondary leakage inductor: 200mH+10%
X’FMR
Open lamp voltage less than 95% of endure voltage?
Fi
Secondary DCR: 770ohm+15%
OK
Striking voltage higher than lamps’ start up voltage (1000V)?
OK
na
Normal running voltage less than 85% of endure voltage?
Striking Time
Striking time >1S?
2
Input Current
E
Switching
OK
Inrush current less than Spec. or I T?
OK
Normal running current less than 60% of Spec. (1A)?
OK
Operating range of VGS less than 90%of Spec. (+25V)?
OK
Operating range of VDS less than 90%of Spec. (+30V)?
OK
ti
al
to
D
Bo
C
OK
Balance
Current difference less than 1mA?
none
G
Efficiency
Higher than 80%?
OK
72 hours run in test
OK
en
F
o
24 hours 40 C burn in test
Reliability
none
o
-20~70 C thermal shock test
none
Vibration test
none
Item
DIM
ENA
Co
2. Test spec:
nf
id
H
Freq
Remark
1
12V
3V
5V
<100mA
-
-
2
t
IOUT
gh
IIN
12V
3V
5V
<2A
6-7mA
48-52KHz
IOUT (max) & Operating frequency test
3
12V
0V
5V
<800mA
0.5-1.5mA
195-205Hz
IOUT (min) & burst frequency test
ri
VIN
Open lamp test: inverter shutdown
4
12V
3V
0.5V
<100mA
0
-
On
-B
On/off test: inverter shutdown
Confidential
OB_DOC_DBM_18A0
-3-
①
②
③
Amplifier
HV
GND
Bo
Inverter
ENA
System board
DIM
100Kohm
na
Fi
④
de
(贝
纳
12V 0~3V 5V
Current
Oscilloscope
化
DC Power Supply
电
)
3. Test setup & equipments:
RTN
LOAD
to
Vin+
ti
al
1Kohm
Multimeter
Test equipment
Model
Vendor
①
DC Power Supply
GPS-3303C 3CH
GW INSTEK
②
Oscilloscope
Wave Surfer 424
LeCrow
③
Current Amplifier
TCP 300
Tektronix
④
High Voltage Probe
P6015A 1000X
Tektronix
⑤
Multimeter
45
FLUKE
On
-B
ri
gh
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Co
Item
nf
id
en
⑤
Confidential
OB_DOC_DBM_18A0
-4-
-5-
1
2
3
4
5
6
C5
2.2uF
Q1
2N3904
R4
10
C2
10nF
R1
10K
VIN
5V
F1
1uF
C4
39nF
C3
1A
VS
8
7
6
5
4
3
2
1
10K
R2
OB 3318
P-GAT E
VDDA
VS
ST IME
NC
CS
DIM
SV D
N-GAT E
PGND
RI
RT
AGND
9
10
11
12
13
14
15
16
LOAD: 100Kohm Dummy Load
ENA: Disable, 0-0.8V; Enable, 2-5V
C7
R6
10K
R5
82K
33
R10
33
R9
R7
110K
10nF
C8
C6
100nF
R8
33K
10nF
CP 2
Open
CP 1
Open
P-GAT E
NC
C12
51K
R14
5
C11
2.2uF
C10
2.2uF
T1
C15
15nF
C14
15pF 3KV
100pF 3KV
C13
)
电
430
R13
100nF
C17
D2
BA V99
化
(贝
纳
D1
BA V99
de
Fi
9
4,5,6
8
20:2485
1,2,3
U2
AO4606
C16
100nF
N-GAT E
R12
1M
VS
na
Bo
R11
10K
N-GAT E
to
5V
C9
47nF
ZD2
5.6V
P-GAT E
ti
al
en
id
nf
BF/DMOD
C1
22uF
Co
CMP/S ST
ENA
U1
t
gh
DIM: 3V, Max. Brightness; 0V, Min. Brightness
VIN: 12V Typical
ZD1
5.6V
R3
10K
VIN
VIN
VIN
GND
GND
DIM
ENA
CN1
ri
-B
6
D2
4
G2
7
D2
3
S2
8
D1
G1
2
D1
S1
1
On
L
H
CN20
4. System Schematic:
Confidential
OB_DOC_DBM_18A0
5. Bill of material:
Parts
Designator
QTY
OB3318/SOP16
U1
1
AO4606(N+P MOSFET)
U2
1
22uF/25V/1812
C1
1
10nF/25V/0805
C2,C7,C8
3
39nF/25V/0805
C3
1
1uF/25V/0805
C4
1
2.2uF/50V/0805
C5,C10,C11
3
100nF/25V/0805
C6,C16,C17
3
47nF/25V/0805
C9
NC
C12
100pF/3KV/1808
C13
15pF/3KV/1808
C14
15nF/50V/0805
C15
Cost
化
电
)
IC
0
Bo
na
1
1
1
R1
10K/0805
R2,R3,R6,R11
4
10ohm/0805
R4
1
62K/0805
R5
1
ti
al
to
10K/1206
1
R7
1
R8
1
R9,R10
2
R12
1
R13
1
R14
1
ZD1,ZD2
2
BAV99 Dual Diode
D1,D2
2
1A Fuse/1206
F1
1
33K/1%/0805
en
33ohm/0805
430ohm/1%/0805
51K/0805
nf
Other
id
1M/0805
Co
5.6V Zener Diode
T1
1
2N3904/SOT23
Q1
1
6PIN Connector
CN1
1
2PIN HV Connector
CN2
1
PCB
OB3318 DEMO BOARD B2
1
ri
gh
t
UI9.8 Transformer
On
-B
de
Fi
1
Resistors
110K/1%/0805
(贝
纳
Capacitors
Confidential
OB_DOC_DBM_18A0
-6-
6. PCB Gerber File:
de
(贝
纳
化
电
)
Top layer:
ti
al
to
Bo
na
Fi
Bottom layer:
On
-B
ri
gh
t
Co
nf
id
en
Top overlay:
Confidential
OB_DOC_DBM_18A0
-7-
Test Report
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
1. System striking frequency & striking voltage
en
CH1: Gate1 Striking frequency: 68.1KHz
id
CH2: None
CH3: Output voltage Striking voltage: 1.242KV
nf
CH4: Output current
On
-B
ri
gh
t
Co
*Start with lamp open then check output voltage
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OB_DOC_DBM_18A0
-8-
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
2. Striking process control and striking timer
CH1: Gate1 Striking time approximately is 1.3S
CH3: Striking voltage
en
CH2: VS Regulated to 3.08V
id
CH4: STIME Shutdown when STIME voltage rises to 2.72V threshold
On
-B
ri
gh
t
Co
nf
*Start with lamp open then check output voltage and it’s maintain time
Confidential
OB_DOC_DBM_18A0
-9-
ti
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to
Bo
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Fi
de
(贝
纳
化
电
)
3. Normal operating frequency & voltage
CH1: Gate1 Normal operating frequency: 51.9KHz
CH3: Output voltage
On
-B
ri
gh
t
Co
nf
id
CH4: Output current
en
CH2: None
Confidential
OB_DOC_DBM_18A0
- 10 -
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
4. Soft start time
CH1: Gate1
CH2: CMP Soft start time: 10.0mS
en
CH3: CS
id
CH4: Output current
nf
*Soft start function can reduces the inrush current and avoids unnecessary stresses with other inverter
On
-B
ri
gh
t
Co
components and CCFL lamp.
Confidential
OB_DOC_DBM_18A0
- 11 -
On
-B
ri
gh
t
Co
nf
id
en
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
5. Soft on/off time
CH1: Gate1
CH2: CMP Soft on time:536.7uS, Soft off time: 611.9uS
CH3: CS
CH4: Output current
Confidential
OB_DOC_DBM_18A0
- 12 -
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
6. Internal burst mode dimming control (1: Max. brightness)
CH1: None
CH3: DIM DIM=3.154V
en
CH2: BF Burst frequency: 196.8Hz
id
CH4: Output current Output current: 6.82Ma
On
-B
ri
gh
t
Co
nf
*Test with CP1 and CP2 open
Confidential
OB_DOC_DBM_18A0
- 13 -
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
6. Internal burst mode dimming control (2: Medium brightness)
CH1: None
CH3: DIM DIM=1.577V
en
id
On
-B
ri
gh
t
Co
nf
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OB_DOC_DBM_18A0
- 14 -
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
6. Internal burst mode dimming control (3: Min. brightness)
CH1: None
en
CH3: DIM DIM=0V
id
On
-B
ri
gh
t
Co
nf
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OB_DOC_DBM_18A0
- 15 -
CH1: None
CH3: DIM DIM=3.01V
en
CH2: BF Set to high (>3.5V)
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
7. Internal analog mode dimming control (1: Max. brightness)
id
On
-B
ri
gh
t
Co
nf
*Test with CP1 short and CP2 open
Confidential
OB_DOC_DBM_18A0
- 16 -
CH1: None
CH3: DIM DIM=1.509V
en
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
7. Internal analog mode dimming control (2: Medium brightness)
id
On
-B
ri
gh
t
Co
nf
Confidential
OB_DOC_DBM_18A0
- 17 -
CH1: None
en
CH3: DIM DIM=0V
ti
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to
Bo
na
Fi
de
(贝
纳
化
电
)
7. Internal analog mode dimming control (3: Min. brightness)
id
On
-B
ri
gh
t
Co
nf
Confidential
OB_DOC_DBM_18A0
- 18 -
CH1: None
CH2: BF Set to low (<0.5V)
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
8. External LPWM mode dimming control (1: 80% brightness)
en
CH3: DIM LPWM frequency: 200Hz, duty:80%
id
On
-B
ri
gh
t
Co
nf
*Test with CP1 open and CP2 short
Confidential
OB_DOC_DBM_18A0
- 19 -
CH1: None
CH2: BF Set to low (<0.5V)
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
8. External LPWM mode dimming control (2: 20% brightness)
en
CH3: DIM LPWM frequency: 200Hz, duty:20%
id
On
-B
ri
gh
t
Co
nf
*Test with CP1 open and CP2 short
Confidential
OB_DOC_DBM_18A0
- 20 -
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
9. MOSFET VGS & Transformer primary terminal waveform
CH1: N-GATE
CH2: P-GATE
en
CH3: Transformer primary terminal A V_ds1 voltage: 15.0V (pk-pk)
id
CH4: Transformer primary terminal B
nf
Ma: Transformer primary voltage waveform
On
-B
ri
gh
t
Co
*Check VDS voltage, make sure that it’s less than 60% of MOSFET Spec.
Confidential
OB_DOC_DBM_18A0
- 21 -
On
-B
ri
gh
t
Co
nf
id
en
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
10. System power voltage ripple （continues mode & burst mode dimming）
CH1: VIN System power voltage ripple: 234mV(continues mode) & 238mV(burst mode)
CH2: None
CH3: None
CH4: None
Confidential
OB_DOC_DBM_18A0
- 22 -
On
-B
ri
gh
t
Co
nf
id
en
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
11. System inrush current (continues mode & burst mode dimming)
CH1: None
CH2: None
CH3: None
CH4: System input current None inrush current issue
Confidential
OB_DOC_DBM_18A0
- 23 -
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
12. Open lamp protection in normal operating condition.
CH1: N-GATE Protection delay time: 21.1mS
CH2: CMP
id
en
CH3: CS
On
-B
ri
gh
t
Co
nf
*In normal operation condition, suddenly move out lamp, the inverter should shutdown within 20ms
Confidential
OB_DOC_DBM_18A0
- 24 -
ti
al
to
Bo
na
Fi
de
(贝
纳
化
电
)
13. Output current wave crest factor
CH1: None
CH2: None
en
CH3: None
Ioutput_pk - pk
20mA
=
= 1.49
2 • Ioutput_rm s 2 • 6.70mA
Co
Crest factor:
nf
id
CH4: Output current wave Ioutput_rms: 6.70mA, Ioutput_pk-pk: 20mA
On
-B
ri
gh
t
Spec.: 1.414+10%=(1.2726~1.5554)
Confidential
OB_DOC_DBM_18A0
- 25 -
14. System efficiency
电
)
Test in max brightness condition (DIM>3.0V).
化
Output current: 6.57mA, Load impedance: 99Kohm, output power: 4.273W
(贝
纳
Input voltage: 12.1V, input current: 0.40A, input power rate: 4.84W
On
-B
ri
gh
t
Co
nf
id
en
ti
al
to
Bo
na
Fi
de
System efficiency:4.273/4.84=88.3%
Confidential
OB_DOC_DBM_18A0
- 26 -

OB3318 Demo Board Manual

Transcription

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