EL7630IWTZ-T7A Intersil, EL7630IWTZ-T7A Datasheet - Page 4

• Manufacturer Part Number: EL7630IWTZ-T7A
• Description: IC LED DRIVR WHITE BCKLGT TSOT-5
• Manufacturer: Intersil
• Type: Backlight, White LEDr

Specifications of EL7630IWTZ-T7A

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1.35MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 27V
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Efficiency: 86%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Performance Curves
Block Diagram
Pin Functions
LX (Pin 1) - Switching Pin. Connect to inductor and diode.
GND (Pin 2) - Ground Pin. Connect to local ground.
FB (Pin 3) - Feedback Pin. Connect to the cathode of lowest
LED and the sense resistor.
ENAB (Pin 4) - Enable Pin. Connect to enable signal to
turn-on or off the device.
4
1.2MHz Oscillator and Ramp
1.2MHz Oscillator and Ramp
Comparator
Comparator
20
16
12
22
FIGURE 6. PWM DIMMING CURVE (400Hz)
8
4
0
PWM
PWM
in TSOT5 package) GND
in TSOT5 package) GND
FIGURE 7. EL7630 BLOCK DIAGRAM
(shared with PGND
(shared with PGND
0
GM Amp
GM Amp
Compensation
Compensation
Generator
Generator
Vin
Vin
20
PWM Logic
PWM Logic
EL7630
Controller
Controller
DUTY-CYCLE (D)
40
Amplifier
Amplifier
GM
GM
Enable
Enable
PGND (Pin 5, SC-70 Package) - Ground Pin. Connect to
Pin 2 and to local ground.
V
Connect to the input supply voltage.
60
IN
95mV
95mV
Current
Current
Sense
Sense
(Pin5/Pin6 SC-70 Package) - Input Supply Pin.
Driver
Driver
FET
FET
80
EL7630
EL7630
Reference
Reference
Generator
Generator
Bandgap
Bandgap
100
PGND
PGND
FB
FB
LX
LX
February 22, 2006
FN7371.1