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ISL97801 の電気的特性と機能

ISL97801のメーカーはIntersil Corporationです、この部品の機能は「High Power LED Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL97801
部品説明 High Power LED Driver
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 




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ISL97801 Datasheet, ISL97801 PDF,ピン配置, 機能
®
Data Sheet
April 2, 2007
ISL97801
FN6428.1
High Power LED Driver
The ISL97801 is a high-power LED backlight driver with an
integrated 36V FET designed to drive up to 8 high-power
LEDs in series. The PWM converter runs from an internally
generated 1MHz clock. With efficiencies over 90% the
regulator provides tight control of LED current and may be
configured in either boost or buck topologies, allowing from 3
to 8 series diodes to be driven from wide input voltages.
LED light level may be controlled either by:
1. LED DC bias current set via the LEVEL pin, or
2. External low frequency PWM control via the
ENABLE/PWM pin.
In both control modes optional over temperature thermal
protection of the LED reduces the LED DC bias current
above an adjustable set temperature, protecting the LED
from thermal damage. An optional fault monitor drives an
external FET between the input supply and inductor,
providing short circuit current protection for the LED and
inductor as well as load dump protection for automotive
applications. For low cost applications the pass transistor
may be omitted and the fault pin bypassed.
The ISL97801 is packaged in a 20 Ld 4mm x 4mm QFN
package and is specified for operation over the -40°C to
+105°C temperature range.
Ordering Information
PART
NUMBER
(Note)
TAPE &
PART REEL/
MARKING QTY
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL97801ARZ 978 01ARZ - 20 Ld 4x4 QFN L20.4x4C
ISL97801ARZ-TK 978 01ARZ 13”/ 20 Ld 4x4 QFN L20.4x4C
1,000
ISL97801ARZ-T 978 01ARZ 13”/ 20 Ld 4x4 QFN L20.4x4C
6,000
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
Features
• Drives 3-8 high-power LEDs in series, up to 32V
• 2.7V to 16V input voltage range
• Boost or Buck configurable switch
• 3A integrated FET
• Automotive load dump protection
• Light output temperature compensation
• LED over-temperature protection
• LED disconnect
• PWM/analog light level control
• Small, 20 Ld 4mm x 4mm QFN package
• Pb-free plus anneal available (RoHS compliant)
Applications
• Display backlighting
- Automotive
- LCD monitor
- Notebook displays
• LED accent lighting
• Automotive lighting
Pinout
ISL97801
(20 LD 4X4 QFN)
TOP VIEW
VDC 1
VHI 2
OVP 3
SWD1 4
SWD2 5
THERMAL
PAD
15 ENL
14 MODE
13 EN/PWM
12 SWS1
11 SWS2
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

1 Page





ISL97801 pdf, ピン配列
ISL97801
Electrical Specifications VBAT = VIN = 12V, VDC = 5V, TA = -40°C to +105°C unless otherwise specified. (Continued)
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX
VLEVEL
FBUV FAULT
FBOV FAULT
fSW
fDIMMING
Light Control Voltage Linear Input Range Mode = 1, analog control of LED current
Feedback Undervoltage Fault
VLEVEL = 1V, EN/PWM = 3V
Feedback Overvoltage Fault
VLEVEL = 1V, EN/PWM = 3V
Switching Frequency
Maximum Recommended PWM
Dimming Frequency
Mode = 1, modulation signal applied to
EN/PWM
0.25
120
220
850
160
250
1000
10
3
180
280
1150
tSWITCH
RLSDRIVERL
RLSDRIVERH
tFAULT
tDELAY
VFAULTPUMP
VBOOST
VBUCK
VMODEL
VMODEH
enFAULT
Load Switch Transition Time
Load Switch Driver Impedance Low
Load Switch Driver Impedance High
Fault Timer Period
Start-up Delay
Fault Pin Charge Pump
Boost Mode Threshold
Buck Mode Threshold
Mode Low Threshold
Mode High Threshold
Input Level Applied to TMAX Pin to
Enable Fault Protection
CGATE = 2nF
EN/PWM = 0
EN/PWM = 3V
Timed LX switching delay
VBAT = VIN = 3V
BUCK/BOOSTN = GND
BUCK/BOOSTN = VDC
MODE = GND
MODE = VDC
100
30
30
40 50
0.85 1
6
0.94VDC
2/3VDC
50
50
58
1.17
0.4VDC
1/3VDC
0.9VDC
disFAULT
Input Level Applied to TMAX Pin to
Disable Fault Protection
0.96VDC
enTEMP
Input Level Applied to TEMP Pin to
Enable Temperature Compensation
0.5
disTEMP
Input Level Applied to TEMP Pin to
Disable Temperature Compensation
0.08
TCOMPP
VFB Positive Temperature
Compensation; VFB/VFBnom
VTEMP/VDC = 0.80
1.26
TCOMPN
VFB Negative Temperature
Compensation; VFB/VFBnom
VTEMP/VDC = 0.20
0.74
TTRIP
Internal Temperature Protection
Threshold
135
THYS
Internal Temperature Protection
Hysteresis
25
VEN/PWML
VEN/PWMH
VDCUVLO
Rschottky
EN/PWM Pin Input Low Threshold
EN/PWM Pin Input High Threshold
VDC Under Voltage Lockout
Internal Schottky Diode for Buck
1.2
2.5
2.6
15 23
UNIT
V
mV
mV
kHz
kHz
ns
Ω
Ω
ms
ms
V
V
V
V
V
V
V
V
V
°C
°C
V
V
V
Ω
.
MODE
1
Don’t Care
0
TABLE 1. LIGHT OUTPUT CONTROL, VDC = 5.0V
TEMP
OPERATING MODE
(VDC - 0.25) > V > 0.25V Standard Mode light level to PWM modulation of EN/PWM input; LED bias current determined by
LEVEL voltage, nominal 1V
V < 0.25V
Disable temperature compensation
V < (VDC - 0.25)
Fixed Bias Mode VFB level internally set to 0.4V, independent of VLEVEL
3 FN6428.1
April 2, 2007


3Pages


ISL97801 電子部品, 半導体
ISL97801
Typical Performance Curves (Continued)
41
5 LEDs
40 ILEDpeak = 380mA
DUTY CYCLE = 10%
39 10% @ 100Hz
38
37
36 10% @ 10kHz
35
34
6 8 10 12 14 16 18
VIN (V)
FIGURE 13. 5 LEDs LINE REGULATION OF PWM DUTY
CYCLE OF 10%
42
41
3 LEDs
ILEDpeak = 380mA
40 DUTY CYCLE = 10%
39
PWM @ 100Hz
38
37
36
35
34 PWM @ 10kHz
33
32
4 5 67
8 9 10
VIN (V)
FIGURE 14. 3 LEDs LINE REGULATION OF PWM DUTY
CYCLE OF 10%
400
RSET = 0.5Ω
350 DUTY CYCLE = 100%
300
250 5 LED
8 LED
200
150
100
50
3 LED
0
0 0.2 0.4 0.6 0.8
VLEVEL (V)
FIGURE 15. LED CURRENT vs VLEVEL BIAS
1.0
0.1 EN/PWM = 0
VLEVEL = 1V
TA = +25°C
0.01
0.001
0.00016
8 10 12 14 16 18
VIN (V)
FIGURE 16. QUIESCENT CURRENT (NON-SWITCHING)
8 LEDs
ILED = 350mA
8 LEDs
ILED = 350mA
FIGURE 17. START-UP WAVEFORMS
6
FIGURE 18. START-UP WAVEFORMS ZOOM-IN
FN6428.1
April 2, 2007

6 Page



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部品番号部品説明メーカ
ISL97801

High Power LED Driver

Intersil Corporation
Intersil Corporation


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