参数资料
| 型号： | MAX8709BETI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 19/24页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR CCFL HI EFF 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | CCFL 控制器 |
| 频率： | 25 ~ 300 kHz |
| 电流 - 电源： | 1.5mA |
| 电流 - 输出： | 500mA |
| 电源电压： | 4.6 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
High-Efficiency CCFL Backlight
Controller with SMBus Interface
Table 4. SHMD Register Bit Descriptions
BIT
2
1
0
NAME
SHMD2
SHMD1
SHMD0
POR
STATE
0
0
1
DESCRIPTION
SHMD2 = 1 forces the lamp off and sets STATUS1. SHMD2 = 0 allows the lamp to operate,
although it may still be shut down by SUS (depending on the state of SHMD1 and SHMD0).
When SUS = 0, this bit has no effect. SUS = 1 and SHMD1 = 1 forces the lamp off and sets STATUS1.
SUS = 1 and SHMD1 = 0 allows the lamp to operate, although it may still be shut down by the SHMD2 bit.
When SUS = 1, this bit has no effect. SUS = 0 and SHMD0 = 1 forces the lamp off and sets STATUS1.
SUS = 0 and SHMD0 = 0 allows the lamp to operate, although it may still be shut down by the SHMD2 bit.
Brightness Register [BRIGHT4 – BRIGHT0]
(POR = 0b10111)
The 5-bit brightness register corresponds to the 5-bit
brightness code used in dimming control (See the
Dimming Control section). BRIGHT4 - BRIGHT0 =
0b11111 sets minimum brightness and BRIGHT4 -
BRIGHT0 = 0b00000 sets maximum brightness. Note that
the brightness-register polarity of command bytes 0xA9
and 0xAA are inverted from that of command byte 0x01.
Shutdown-Mode Register [SHMD2–SHMD0]
(POR = 0b001)
The 3-bit shutdown-mode register configures the oper-
ation of the device when the SUS pin is toggled as
described in Table 4. The shutdown-mode register can
also be used to directly shut off the CCFL regardless of
the state of SUS (Table 5).
Table 5. SUS and SHMD Register Truth
Table
Status Register [STATUS1–STATUS0]
(POR = 0b11)
The status register returns information on fault condi-
tions. If the MAX8709B detects that V IFB does not
exceed 30% of V LOT continuously for 1.22s, the IC
latches STATUS1 to zero. STATUS1 is reset to 1 by tog-
gling SUS or by toggling the input power.
STATUS0 reports 1 as long as no overcurrent condi-
tions are detected. If an overcurrent condition is detect-
ed in any given DPWM period, STATUS0 is cleared for
the duration of the following DPWM period. If an over-
current condition is not detected in any given DPWM
period, STATUS0 is set for the duration of the following
DPWM period. Note that the status-register polarity of
command bytes 0xA9 and 0xAA are inverted from that
of command byte 0x02.
ID Registers
The ID registers return information on the manufacturer
chip ID and the chip revision number. The MAX8709B is
SUS
0
SHMD2 SHMD1 SHMD0
0 X 0
OPERATING MODE
Operate
the first-generation advanced CCFL controller and its
ChipRev is 0x00. Reading from MfgID register returns
0x4D, which is the ASCII code for M (for Maxim). The
0
1
1
X
0
0
0
1
X
0
1
X
1
X
X
X
Shutdown, STATUS1 set
Operate
Shutdown, STATUS1 set
Shutdown, STATUS1 set
ChipID register returns 0x0D. Writing to these registers
has no effect.
Table 6. Status-Register Bit Descriptions (Read Only, Writes Have No Effect)
BIT
NAME
POR
STATE
DESCRIPTION
STATUS1 = 0 (or STATUS1 = 1) means that a lamp-out condition has been detected. The
1
STATUS1
1
STATUS1 bit stays clear even after the lamp-out condition has gone away. The only way to set
STATUS1 is to shut off the lamp by programming the shutdown-mode register or by toggling SUS.
STATUS0 = 0 (or STATUS0 = 1) means that an overcurrent condition was detected during the
0
STATUS0
1
previous DPWM period. STATUS0 = 1 means that an overcurrent condition was not detected
during the previous DPWM period.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8709ETI | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8709ETI+ | 功能描述:显示驱动器和控制器 CCFL Backlight Controller w/SMBus RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8709ETI+T | 功能描述:显示驱动器和控制器 CCFL Backlight Controller w/SMBus RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8709ETI-T | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8709EVKIT | 功能描述:显示开发工具 MAX8709 Eval Kit RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V |
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