DS3881E+C Maxim Integrated Products, DS3881E+C Datasheet - Page 27

• Manufacturer Part Number: DS3881E+C
• Description: IC CCFL CONTROL 24TSSOP
• Manufacturer: Maxim Integrated Products
• Type: CCFL Controllerr

Specifications of DS3881E+C

• Frequency: 40 ~ 100 kHz
• Current - Supply: 12mA
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 24-TSSOP
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: + 105 C
• Supply Current: 12 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: DS3881E+; DS3881E+

Table 9. Transformer Specifications (as Used in the Typical Operating Circuit )
Table 10. Resistor and Capacitor Selection Guide
Note 1: Primary should be Bifilar wound with center tap connection.
Note 2: Turns ratio is defined as secondary winding divided by the sum of both primary windings.
Note 3: 40:1 is the nominal turns ratio for driving a 438mm x 2.2mm lamp with a 12V supply. Refer to Application Note 3375 for more
Turns Ratio (Secondary/Primary)
Frequency
Output Power
Output Current
Primary DCR
Secondary DCR
Primary Leakage
Secondary Leakage
Primary Inductance
Secondary Inductance
Secondary Output Voltage
DESIGNATOR
R5, R6
R3, R4
R10
R11
C8
C2
C3
C1
C7
R9
R1
R2
R7
information.
Single-Channel Automotive CCFL Controller
PARAMETER
2/DS3881
1/Chan
1/Chan
1/Chan
1/Chan
1/Chan
QTY
1
1
1
1
1
1
1
12.5kΩ to
20kΩ to
18kΩ to
VALUE
105kΩ
100nF
4.7kΩ
4.7kΩ
4.7kΩ
10kΩ
40kΩ
45kΩ
140Ω
0.1µF
10pF
27nF
33µF
(Notes 1, 2, 3)
Center tap to one end
100ms minimum
Continuous
TOLERANCE
(%) AT +25°C
____________________________________________________________________
CONDITIONS
10
20
10
1
1
1
1
5
5
5
1
5
5
TEMPERATURE
COEFFICIENT
±1000ppm/°C
≤153ppm/°C
≤153ppm/°C
Any grade
Any grade
Any grade
Any grade
X7R
X7R
X7R
—
—
—
2000
1000
MIN
—
See the Setting the SVM Threshold Voltage section.
2% or less total tolerance. See the Lamp Frequency
Configuration section to determine value.
2% or less total tolerance. See the Lamp Frequency
Configuration section to determine value.
—
—
—
See the Setting the RMS Lamp Current section.
C ap aci tor val ue w i l l al so affect LC M b i as vol tag e d ur i ng
p ow er - up . A l ar g er cap aci tor m ay cause a l ong er ti m e
for V
2kV to 4kV breakdown voltage required.
C ap aci tor val ue w i l l al so affect LC M b i as vol tag e d ur i ng
p ow er - up . A l ar g er cap aci tor m ay cause a l ong er ti m e
for V
—
Place close to V
40
D C B
D C B
to r each i ts nor m al op er ati ng l evel .
to r each i ts nor m al op er ati ng l evel .
TYP
200
500
185
500
40
12
70
CC
5
and GND on DS3881.
NOTES
MAX
80
6
8
UNITS
V
kHz
mΩ
mH
mH
mA
µH
µH
RMS
W
Ω
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