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| 型号： | DS3882E+T&R/C |
| 厂商： | Maxim Integrated |
| 文件页数： | 1/31页 |
| 文件大小： | 0K |
| 描述： | IC AUTO CCFL CTRLR 2CH 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 类型： | CCFL 控制器 |
| 频率： | 40 ~ 100 kHz |
| 电流 - 电源： | 12mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 带卷 (TR) |
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19-5666; Rev 2; 12/10
Dual-Channel Automotive CCFL Controller
General Description
The DS3882 is a dual-channel cold-cathode fluorescent
lamp (CCFL) controller for automotive applications that
provides up to 300:1 dimming. It is ideal for driving
CCFLs used to backlight liquid crystal displays (LCDs)
in navigation and infotainment applications and for dri-
ving CCFLs used to backlight instrument clusters. The
DS3882 is also appropriate for use in marine and avia-
tion applications.
The DS3882 features EMI suppression functionality and
provides a lamp current overdrive mode for rapid lamp
heating in cold weather conditions. The DS3882 sup-
ports configurations of 1 or 2 lamps with fully indepen-
dent lamp control and minimal external components.
Multiple DS3882 controllers can be cascaded to sup-
port applications requiring more than 2 lamps. Control of
the DS3882, after initial programming setup, can be
completely achieved through I 2 C software communica-
tion. Many DS3882 functions are also pin-controllable if
software control is not desired.
Applications
Automotive LCDs
Instrument Clusters
Marine and Aviation LCDs
Pin Configuration
Features
? Dual-Channel CCFL Controllers for Backlighting
LCD Panels and Instrument Clusters in
Automotive Navigation/Infotainment Applications
? Minimal External Components Required
? I 2 C Interface
? Per-Channel Lamp-Fault Monitoring for Lamp-
Open, Lamp-Overcurrent, Failure to Strike, and
Overvoltage Conditions
? Status Register Reports Fault Conditions
? Accurate (±5%) Independent On-Board Oscillators
for Lamp Frequency (40kHz to 100kHz) and DPWM
Burst-Dimming Frequency (22.5Hz to 440Hz)
? Lamp and DPWM Frequencies can be
Synchronized with External Sources to Reduce
Visual LCD Artifacts in Video Applications
? Optional Spread-Spectrum Lamp Clock Reduces
EMI
? Lamp Frequency can be Stepped Up or Down to
Move EMI Spurs Out of Band
? Lamp Current Overdrive Mode with Automatic
Turn-Off Quickly Warms Lamp in Cold
Temperatures
? Analog and Digital Brightness Control
? 300:1 Dimming Range Possible Using the Digital
Brightness Control Option
TOP VIEW
FAULT 1
A0 2
SDA 3
SCL 4
+
28 OVD2
27 LCM2
26 GB2
25 GA2
? Programmable Soft-Start Minimizes Audible
Transformer Noise
? On-Board Nonvolatile (NV) Memory Allows Device
Customization
? 8-Byte NV User Memory for Storage of Serial
Numbers and Date Codes
LSYNC 5
LOSC 6
BRIGHT 7
PSYNC 8
POSC 9
A1 10
GND_S 11
DS3882
24 V CC
23 PDN
22 LCO
21 GND
20 STEP
19 N.C.
18 OVD1
? Low-Power Standby Mode
? 4.75V to 5.25V Single-Supply Operation
? Temperature Range: -40°C to +105°C
? 28-Pin TSSOP Package
Ordering Information
SVML 12
SVMH 13
V CC 14
17 LCM1
16 GB1
15 GA1
PART
DS3882E+C
DS3882E+T&R/C
TEMP RANGE
-40°C to +105°C
-40°C to +105°C
PIN-PACKAGE
28 TSSOP
28 TSSOP
TSSOP
Typical Operating Circuit appears at end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
______________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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