DATASHEET
To request the full datasheet, please visit
www.intersil.com/products/isl98611
ISL98611
High Efficiency Display Power and LED Driver for Smart Phones
The
ISL98611
is a high-efficiency display power supply and
LED driver for small size displays, such as smart phones. It
integrates a boost regulator, LDO, and inverting charge pump
that are used to generate regulated positive and negative
voltages for display power. It also integrates a boost regulator
and 3-channel current sinks for the LED backlight driver. The
positive and negative output voltages can be adjusted from
±4.5V up to ±6V.
The ISL98611 extends the battery life of mobile devices by
delivering greater than 88% efficiency for the display power
function and up to 93% efficiency for the backlight driver when
powering 12 LEDs. It reduces the PCB area by integrating the
two functions into a single IC and by requiring only eight
external components in total.
This product drives backlight LEDs with excellent current
matching even at very low LED current (±2.2% down to 1mA
and ±2.8% at 50μA), improving the brightness uniformity of
LCD displays. It includes analog, PWM, and hybrid dimming to
maximize LED efficiency while eliminating color shift issues.
The ISL98611 is offered in a 2.33x2.61mm
2
WLCSP package
and the device is specified for operation across the
-40°C to +85°C ambient temperature range.
FN8662
Rev.4.00
Sep 13, 2017
Features
• Display power output voltage: ±5V, ±5.6V
• Positive and negative voltages can be programmed from
±4.5V to ±6V
• >88% efficiency with 12mA load between VP and VN
• Up to 93% efficient LED driver
• Only 8 external components; integrated compensation and
feedback circuits
• Analog, PWM, and hybrid dimming
• ±2.2% current matching down to 1mA and ±2.8% at 50μA
• Can drive 2 strings of LEDs
• 10-bit linear and 11-bit logarithmic DC output current
control
• I
2
C, PWM, and SWIRE dimming inputs with internal
multiplier for CABC
• 2.5V to 5V input voltage range
• VP and VN output adjustable from ±4.5V up to ±6V with
50mV steps
• I
2
C adjustable output voltages and settings
• 1µA shutdown supply current
• RoHS compliant
TABLE 1. KEY DIFFERENCES BETWEEN PARTS
PART NUMBER
ISL98611IIZ-T
ISL98611II56Z-T
VP/VN OPTIONS (V)
±5
±5.6
Applications
• TFT-LCD Smart phone displays
• Small size/handheld display
Related Literature
• For a full list of related documents, visit our website
-
ISL98611
product page
V
IN
2.5V TO 5V
C
IN
10µF
0402
L
1
2.2µH
3P6S 30mA/string
L
2
10µH
VIN
C
VLED
4.7µF
0603
LXLED VLED
CH0
CH1
CH2
VBSTCP
VBST
LXBST
ISL98611
CP
FAULT
SWIRE
PWMI
SCL
SDA
ENP
ENN
ENLED
CN
C
CP
10µF
0402
C
VBST
10µF
0402
C
VN
10µF
0402
PROCESSOR
VN
VSUB
AGND
PGND
VP
-5.0V
LCD PANEL
NEGATIVE SUPPLY
POSITIVE SUPPLY
C
VP
10µF
0402
+5.0V
FIGURE 1. TYPICAL APPLICATION CIRCUIT FOR 3-CHANNEL LED DRIVER
FN8662 Rev.4.00
Sep 13, 2017
Page 1 of 2
ISL98611
V
IN
2.5V TO 5V
C
IN
10µF
0402
L
1
2.2µH
2P7S 30mA/string
L
2
10µH
VIN
C
VLED
4.7µF
0603
LXLED VLED
CH0
CH1
CH2
VBSTCP
VBST
CP
FAULT
SWIRE
PWMI
SCL
SDA
ENP
ENN
ENLED
CN
C
VN
10µF
0402
C
CP
10µF
0402
C
VBST
10µF
0402
LXBST
ISL98611
PROCESSOR
VN
VSUB
AGND
PGND
VP
-5.0V
LCD PANEL
NEGATIVE SUPPLY
POSITIVE SUPPLY
C
VP
10µF
0402
+5.0V
FIGURE 2. TYPICAL APPLICATION CIRCUIT FOR 2-CHANNEL LED DRIVER
© Copyright Intersil Americas LLC 2014-2017. All Rights Reserved.
All trademarks and registered trademarks are the property of their respective owners.
For additional products, see
www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at
www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such
modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are
current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its
subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see
www.intersil.com
FN8662 Rev.4.00
Sep 13, 2017
Page 2 of 2
京公网安备 11010802033920号
EEWORLD
