DS3992Z-18P+ Maxim Integrated Products, DS3992Z-18P+ Datasheet - Page 10

• Manufacturer Part Number: DS3992Z-18P+
• Description: IC CTRLR CCFL 180-440HZ 16-SOIC
• Manufacturer: Maxim Integrated Products
• Type: CCFL Controllerr

Specifications of DS3992Z-18P+

• Frequency: 40 ~ 80 kHz
• Current - Supply: 8mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Details

efficiency and transient response of the system. Table 2
shows a transformer specification that has been utilized
for a 12V inverter supply, 438mm x 2.2mm lamp design.
The n-channel MOSFET must have a threshold voltage
that is low enough to work with logic-level signals, a low
on-resistance to maximize efficiency and limit the n-
channel MOSFET’s power dissipation, and a break-
Two-Channel, Push-Pull CCFL Controller
Table 2. Transformer Specifications (as Used in the Typical Operating Circuit )
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 AN3375 for more information.
10
Turns Ratio (Secondary/Primary)
Frequency
Output Power
Output Current
Primary DCR
Secondary DCR
Primary Leakage
Secondary Leakage
Primary Inductance
Secondary Inductance
Secondary Output Voltage
____________________________________________________________________
PARAMETER
(Notes 1, 2, 3)
Center tap to one end
1000ms minimum
Continuous
CONDITIONS
down voltage high enough to handle the transient. The
breakdown voltage should be a minimum of 3x the
inverter voltage supply. Additionally, the total gate
charge must be less than Q
Recommended Operating Conditions table. These
specifications are easily met by many of the dual n-
channel MOSFETs now available in SO-8 packages.
2000
1000
MIN
40
G
, which is specified in the
TYP
200
500
185
500
40
12
70
5
MAX
80
6
8
UNITS
V
kHz
mA
mΩ
mH
mH
µH
µH
RMS
W
Ω