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参数资料
| 型号： | ISL97693IRTZ |
| 厂商： | Intersil |
| 文件页数： | 20/28页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR BACKLIGHT 16TQFN |
| 标准包装： | 100 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 6 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 频率： | 400kHz ~ 1.5MHz |
| 电源电压： | 2.5 V ~ 5.5 V |
| 输出电压： | 26V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN（3x3） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页当前第20页第21页第22页第23页第24页第25页第26页第27页第28页
ISL97692, ISL97693, ISL97694A
TABLE 2. I 2 C REGISTER ALLOCATIONS FOR ISL97694A
DEFAULT
SMBUS/I 2 C
ADDRESS
0x00
REGISTER
PWM Brightness Control
BIT 7
BRT11
BIT 6
BRT10
BIT 5
BRT9
BIT 4
BRT8
BIT 3
BRT7
BIT 2
BRT6
BIT 1
BRT5
BIT 0
BRT4
VALUE
0xFF
PROTOCOL
Read and Write
Register MSB
0x01
Device Control Register
-
-
-
-
En12Bit En10Bit
PS_EN
BL_CTL
0x00
Read and Write
0x02
PWM Brightness Control
BRT3
BRT2
BRT1
BRT0
-
-
-
-
0xF0
Read and Write
Register LSB
TABLE 3. I 2 C REGISTER FUNCTIONS FOR ISL97694A
ADDRESS
0x00
0x01
0x02
REGISTER
PWM Brightness Control
Register MSB
Device Control Register
PWM Brightness Control
Register LSB
DATA BIT DESCRIPTIONS
BRT[11..4] = DPWM duty cycle brightness control
In 8 bit PWM data mode, PWM data is BRT[11..4]
In 10 bit PWM data mode, PWM data is BRT[11..2]
In 12 bit PWM data mode, PWM data is BRT[11..0]
PS_EN = Phase shift On/Off (1: Phase shift enabled, 0: Phase shift disabled)
BL_CTL = Backlight On/Off (1: driver enabled if EN pin is high, 0 = driver shut down)
{En12Bit, En10Bit} = {0,0} to select 8 bit PWM data mode
{En12Bit, En10Bit} = {0,1} to select 10 bit PWM data mode
{En12Bit, En10Bit} = {1,0} to select 12 bit PWM data mode
BRT[3..0] = DPWM duty cycle brightness control (10 and 12 bit PWM data modes only). Note: this data
is saved, but the PWM engine is only updated with BRT[11..0] or BRT[11..2] when the PWM Brightness
Control Register MSB 0x00 is written
V OVP ( min ) = 1.18V × ----------------------------------------------
(EQ. 11)
Component Selection
The design of the boost converter is simplified by an internal
compensation scheme allowing easy design without complicated
calculations. Please select your component values using the
following recommendations.
The OVP threshold, R1, and R2 tolerances should also be taken
into account (Equations 11 and 12).
R1min + R2max
R2max
V OVP ( max ) = 1.24V × ----------------------------------------------
Input Capacitor
R1max + R2min
R2min
(EQ. 12)
V OVP ( min ) = 1.18V × -------------------------------------------------------------------------------- = 24.53V
(EQ. 13)
It is recommended that a 4.7μF to 10μF X5R/X7R or equivalent
ceramic input capacitor is used.
Overvoltage Protection (OVP)
The integrated OVP circuit monitors the boost output voltage, V OUT ,
and keeps the voltage at a safe level. The OVP threshold is set as
Calculating V OVP using the OVP threshold range (1.18V to 1.24V)
and 0.1% resistor tolerances gives an actual V OVP range of 24.53V
to 25.88V for the 25.4V previous example (Equations 13 and 14).
( 470 × 0.999 ) + ( 23.7 × 1.001 )
( 23.7 × 1.001 )
V OVP ( min ) = 1.22V × ----------------------
( max ) = 1.24V × -------------------------------------------------------------------------------- = 25.88V
(EQ. 14)
( 470 × 1.001 ) + ( 23.7 × 0.999 )
OVP
( 23.7 × 0.999 )
Equation 9:
R1 + R2
R2
(EQ. 9)
V
It is recommended that parallel capacitors are placed across the
Where:
- V OVP is the maximum boost output voltage, V OUT (V)
- R1 is the resistor from OVP pin to the boost output ( Ω)
- R2 is the resistor from OVP pin to GND ( Ω).
The total R1 plus R2 series resistance should be high to minimize
power loss through the resistor network.
For example, choosing R1 = 470k Ω and R2 = 23.7k Ω per the
Typical Application Circuits on page 2 and Block Diagrams on
OVP resistors such that R1/R2 = C2/C1. Using a C1 value of at
least 30pF is recommended. These capacitors reduce the AC
impedance of the OVP node, which reduces noise susceptibility
when using high value resistors.
Boost Output Voltage Range
The working range of the boost output voltage, V OUT is from 40%
to 100% of the maximum output voltage, V OVP , set by resistors
R1 and R2, as described in the previous section.
V OVP ( typ ) = 1.22V × ---------------------------- = 25.41V
page 4. Set V OVP (typ) to 25.41V (Equation 10).
470 + 23.7
23.7
20
(EQ. 10)
The target applications should be considered carefully to ensure that
V OVP is not set unnecessarily high. For example, using R = 470k Ω
and R2 = 23.7k Ω per the “Typical Application Circuits” on page 2
sets V OVP to between 24.53V to 25.88V when tolerances are
considered.
FN7839.4
December 20, 2012
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL97693IRTZ-T | 功能描述:IC LED DRVR BACKLIGHT 16TQFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| ISL97693IRTZ-TK | 功能描述:IC LED DRVR BACKLIGHT 16TQFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| ISL97694AIRTZ | 制造商:Intersil Corporation 功能描述:6 CH W/12-BIT PWM DIMMING SINGLE CELL LI-ION BATTERY POWERED - Rail/Tube 制造商:Intersil Corporation 功能描述:IC LED DRVR BACKLIGHT 20TQFN |
| ISL97694AIRTZ-T | 制造商:Intersil Corporation 功能描述:6 CH W/12-BIT PWM DIMMING SINGLE CELL LI-ION BATTERY POWERED - Tape and Reel 制造商:Intersil Corporation 功能描述:IC LED DRVR BACKLIGHT 20TQFN |
| ISL97694AIRTZ-TK | 功能描述:LED照明驱动器 6CH w/12Bit Dimming Li-Ion LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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