EL1848IWTZ-T7 Intersil, EL1848IWTZ-T7 Datasheet - Page 3

• Manufacturer Part Number: EL1848IWTZ-T7
• Description: IC LED DRIVR WHITE BCKLGT TSOT-8
• Manufacturer: Intersil
• Type: Backlight, White LEDr

Specifications of EL1848IWTZ-T7

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.2MHz
• Voltage - Supply: 2.6 V ~ 13.2 V
• Voltage - Output: 14V
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-8, TSOT-8
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 90mA
• Internal Switch(s): Yes
• Efficiency: 91%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Absolute Maximum Ratings
COMP, CNTL, CS to SGND. . . . . . . . . . . . . . . . . . . . . . -0.3V to +6V
V
V
LX to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+16V
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied. This part is ESD sensitive. Handle with care.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests areat
the specified temperature and are pulsed tests, therefore: T
Electrical Specifications
Pin Descriptions
V
I
I
I
V
I
V
V
I
V
V
ILX
R
I
F
D
I
∆I
IN
OUT
Q1
Q1
COMP
CNTL
OUT_ACCURACY
LEAK
CS
PIN NUMBER
S
IN
COMP
CNTL1
CNTL2
OUT1
OUT2
DS_ON
MAX
PARAMETER
O
to SGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+14V
/∆V
to SGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+14V
IN
1
2
3
4
5
6
7
8
Input Voltage
Total Input Current at Shut-down
Quiescent Supply Current at V
COMP Pin Pull-up Current
COMP Voltage Swing
CNTL Shut-down Current
Chip Enable Voltage
Chip Disable Voltage
V
Over-voltage Threshold
Over-voltage Threshold
MOSFET Current Limit
MOSFET On-resistance
MOSFET Leakage Current
Switching Frequency
Maximum Duty Ratio
CS Input Bias Current
Line Regulation
PIN NAME
CNTL
COMP
PGND
SGND
VOUT
CNTL
VIN
CS
LX
= 1V
DESCRIPTION
3
V
specified.
Compensation pin. A compensation cap (4700pF to 1µF) is normally connected between this pin and SGND.
Power Ground pin. The source of internal MOSFET.
Signal Ground. Ground pin for internal control circuitry. Needs to connect to PGND at only one point.
Control pin for dimming and shut-down. A voltage between 250mV and 5.5V controls the brightness, and less
than 100mV shuts down the converter.
Output voltage sense. Use for over voltage protection.
Inductor connection pin. The drain of internal MOSFET.
Current sense pin. Connect to sensing resistor to set the LED bias current.
Power supply for internal control circuitry.
IN
(T
A
= 3V, V
= 25°C)
O
= 12V, C
O
J
Pin
= T
C
1
= T
= 4.7µF, L = 33µH, C
A
V
V
COMP connected to SGND
CNTL = 0V
V
V
V
V
V
V
CNTL
CNTL
CNTL
OUT
OUT
CNTL
CNTL
IN
= 2.6V - 5.5V
EL1848
rising
falling, with resistive load
= 0V
= 1V, load disconnected
= 1V
= 0V, V
= 2V, I
S
CONDITIONS
LX
= 0
SGND to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 125°C
= 12V
2
= 1µF, C
DESCRIPTION
3
= 0.1µF, R
1
= 5Ω, T
MIN
240
400
800
2.6
0.5
13
14
11
85
A
= 25°C, unless otherwise
1000
TYP
0.03
1.5
0.7
11
15
14
12
90
1
MAX
1200
13.2
100
1.5
2.5
20
16
15
13
1
1
1
1
UNIT
kHz
%/V
mA
mV
mV
mA
mA
µA
µA
µA
µA
µA
%
V
V
Ω
V
V