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ISL97673 の電気的特性と機能

ISL97673のメーカーはIntersilです、この部品の機能は「6-Channel SMBus or PWM Dimming LED Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL97673
部品説明 6-Channel SMBus or PWM Dimming LED Driver
メーカ Intersil
ロゴ Intersil ロゴ 




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ISL97673 Datasheet, ISL97673 PDF,ピン配置, 機能
www.DataSheet4U.com
6-Channel SMBus or PWM Dimming LED Driver
with Phase Shift Control
ISL97673
The ISL97673 is a 6-Channel 45V dual dimming capable
LED driver that can be used with either SMBus/I2C or
PWM signal for dimming control. The ISL97673 drives 6
channels of LED to support 78 LEDs from 4.5V to 26V or
48 LEDs from a boost supply of 2.7V to 26V and a
separate 5V bias on the ISL97673 VIN pin
The ISL97673 compensates for non-uniformity of the
forward voltage drops in the LED strings with its 6 voltage
controlled-current source channels. Its headroom control
monitors the highest LED forward voltage string for output
regulation, to minimize the voltage headroom and power
loss in a typical multi-string operation.
The ISL97673 features optional channel phase shift
control to minimize the input, output ripple
characteristics and load transients as well as spreading
the light output to help reduce the video and audio
interference from the backlight driver operation. The
phase shift can be programmed with equal phase angle
or adjustable in 7-bit resolution.
The ISL97673 has a full range of dimming capabilities
that include SMBus/I2C controlled PWM dimming or DC
dimming. Another key feature of the ISL97673 is that it
allows very linear PWM dimming from 0.4% to 100% of
up to 30kHz. Current matching of 0.4% to 100%
dimming achieves ±1% tolerance from 100Hz to 5kHz
dimming and ±3% tolerance from 5kHz to 30kHz
dimming.
Features
• 6 Channels
• 4.5V to 26.5V Input
• 45V Output Max
• Up to 40mA LED Current per channel
• Extensive Dimming Control
- PWM/DPST Dimming, I2C 8-bit with equal phase
shift, and 0.007% Direct PWM dimming at 200Hz
• Optional Master Fault Protection
• PWM Dimming Linearity 0.4%~100% <30kHz
• 600kHz/1.2MHz selectable switching frequency
• Dynamic Headroom Control
• Protections with Flag Indication
- String Open/Short Circuit, VOUT Short Circuit,
Overvoltage and Over-Temperature Protections
- Optional Master Fault Protection
• Current Matching ±0.7%
• 20 Ld 4mmx3mm QFN Package
Applications*(see page 26)
• Notebook Displays WLED or RGB LED Backlighting
• LCD Monitor LED Backlighting
• Automotive Displays LED Backlighting
Typical Application Circuit
VIN = 4.5~26.5V
VOUT = 45V*, 40mA PER CHANNEL
June 24, 2010
FN7633.0
ISL97673
1 FAULT
2 VIN
4 VDC
LX 20
OVP 16
18 COMP
PGND 19
7 SMBCLK(SCL)/SEL2
6 SMBDAT(SDA)/ CH0 10
_FLAG
CH1 11
3 EN/PWM
CH2 12
17 RSET
CH3 13
8 FPWM
CH4 14
5 SEL1
CH5 15
AGND 9
*VIN > 12V
FIGURE 1. ISL97673 TYPICAL APPLICATION DIAGRAM
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. 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

1 Page





ISL97673 pdf, ピン配列
ISL97673
www.DataSheet4U.com
Ordering Information
PART NUMBER
(Notes 1, 2)
PART
MARKING
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL97673IRZ
7673
20 Ld 4x3 QFN L20.3x4
ISL97673IRZ-EVAL Evaluation Board
NOTES:
1. Add “-T” or “-TK” suffix for tape and reel. Please refer to TB347 for
details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3
termination finish, which is 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.
3. For Moisture Sensitivity Level (MSL), please see device
information page for ISL97673. For more information on
MSL please see techbrief TB363.
Pin Configuration
ISL97673
(20 LD QFN)
TOP VIEW
20 19 18 17
FAULT 1
16 OVP
VIN 2
15 CH5
EN/PWM 3
14 CH4
VDC 4
13 CH3
SEL1 5
SMBDAT(SDA) 6
/_FLAG
12 CH2
11 CH1
7 8 9 10
Pin Descriptions (I = Input, O = Output, S = Supply)
PIN
NAME
FAULT
VIN
EN/PWM
PIN
NUMBER
1
2
3
VDC
SEL1
SMBDAT(SDA)/_FLAG
4
5
6
SMBCLK(SCL)/SEL2
7
FPWM
AGND
CH0, CH1, CH2, CH3, CH4,
CH5
OVP
RSET
8
9
10, 11, 12,
13, 14, 15
16
17
COMP
PGND
LX
18
19
20
TYPE
O
S
I
S
I
I/O
I
I
S
I
I
I
O
S
O
DESCRIPTION
Fault disconnect switch
Input voltage for the device and LED power
Dual Functions: Enable pin and PWM brightness control pin or DPST control
input. The device needs 4ms for initial power-up Enable, then this pin can
be applied with a PWM signal with off time no longer than 28ms.
De-couple capacitor for internally generated supply rail.
Mode select pin 1
When SEL1 is high, this pin is configured as the SMBus/I2C serial data
input/output.
When SEL1 is low or floating, this pin is configured as the fault flag output
and will be pulled low when a fault condition occurs. An external pull-up is
required.
When SEL1 is high, this pin is configured as the SMBus/I2C serial clock
input.
When SEL1 is low or floating, this pins is configured as mode select pin 2,
and operates in conjunction with SEL1 to determine the operating mode.
See Table 1 for details.
PWM Dimming Frequency Set Pin with RFPWM
Analog Ground for precision circuits
Input 0, Input 1, Input 2, Input 3, Input 4, Input 5 to current source, FB,
and monitoring
Overvoltage protection input
Resistor connection for setting LED current, (see Equation 2 for calculating
the ILEDpeak)
Boost compensation pin
Power ground
Input to boost switch
3 FN7633.0
June 24, 2010


3Pages


ISL97673 電子部品, 半導体
ISL97673
www.DataSheet4U.com
Electrical Specifications
All specifications below are tested at TA = +25°C; VIN = 12V, EN/PWM = 5V, RSET = 20.1kΩ,
unless otherwise noted. Boldface limits apply over the operating temperature range,
-40°C to +85°C. (Continued)
PARAMETER
DESCRIPTION
CONDITION
MIN
MAX
(Note 8) TYP (Note 8) UNIT
BOOST
SWILimit
rDS(ON)
SS
Boost FET Current Limit
Internal Boost Switch ON-resistance
Soft-start
TA = +25°C
100% LED Duty Cycle
1.5 2.0 2.7
A
235 300 mΩ
7 ms
Eff_peak Peak Efficiency
ΔIOUT/ΔVIN
DMAX
Line Regulation
Boost Maximum Duty Cycle
VIN = 12V, 72 LEDs, 20mA
each, L = 10µH with DCR
101mΩ, TA = +25°C
VIN = 12V, 60 LEDs, 20mA
each, L = 10µH with DCR
101mΩ, TA = +25°C
92.9
90.8
0.1
FSW = 1, 600kHz
90
FSW = 0, 1.2MHz
81
%
%
%
%
DMIN
Boost Minimum Duty Cycle
FSW = 1, 600kHz
FSW = 0, 1.2MHz
9.5 %
17
fOSC_hi
fOSC_lo
ILX_leakage
Lx Frequency High
Lx Frequency Low
Lx Leakage Current
FSW = 1, 600kHz
FSW = 0, 1.2MHz
LX = 45V, EN = 0
475
0.97
600
1.14
640
1.31
10
kHz
MHz
µA
FAULT DETECTION
VSC Short Circuit Threshold Accuracy
Reg0x08, SC[1:0] = 01
Reg0x08, SC[1:0] = 10
3.15
4.2
3.6
4.8
4.3
5.4
V
V
Reg0x08, SC[1:0] = 11
5.2 5.85 6.6
V
Temp_shtdwn Temperature Shutdown Threshold
150 °C
Temp_Hyst Temperature Shutdown Hysteresis
23 °C
VOVPlo
Overvoltage Limit on OVP Pin
OVPfault
OVP Short Detection Fault Level
CURRENT SOURCES
1.19
400
1.25
V
mV
IMATCH
DC Channel-to-Channel Current Matching
RSET = 20.1kΩ,
Reg0x00 = 0xFF
(IOUT = 20mA)
IACC
Current Accuracy
Vheadroom
Dominant Channel Current Source Headroom at ILED = 20mA
FBx Pin
TA = +25°C
VRSET
Voltage at RSET Pin
RSET = 20.1kΩ
ILEDmax
Maximum LED Current per Channel
VIN = 12V, VOUT = 45V,
Fsw=1.2MHz, TA = +25°C
PWM GENERATOR
-1.5
1.2
±0.7
500
1.22
40
±1.0
+1.5
1.24
%
%
mV
mV
mA
VIL Guaranteed Range for PWMI Input Low Voltage
0.8 V
VIH Guaranteed Range for PWMI Input High Voltage
1.5
VDD
V
FPWM
PWMI Input Frequency Range
200
30,000 Hz
PWMACC PWM Input Accuracy
8 bits
6 FN7633.0
June 24, 2010

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共有リンク

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