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参数资料
| 型号： | ISL97693IRTZ |
| 厂商： | Intersil |
| 文件页数： | 21/28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 |
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ISL97692, ISL97693, ISL97694A
( 8.65 × 10
)
f SW = --------------------------------
The minimum voltage, V OVP (min) = 24.53V, sets the maximum
number of LEDs per channel because this is the worst case
minimum voltage that the boost converter is guaranteed to
supply.
The maximum voltage, V OVP (max) = 25.88V, sets the minimum
number of LEDs per channel because it sets the lowest voltage
that the boost converter is guaranteed to reach:
40% x 25.88V = 10.35V.
Using LEDs with a V F tolerance of 3V to 4V, this V OVP example is
suitable for strings of 4 to 6 LEDs. If fewer than 4 LEDs per
channel are specified, V OVP must be reduced.
Switching Frequency
The boost switching frequency is adjusted by resistor R FSW
(Equation 15):
10
(EQ. 15)
R FSW
Where:
- f SW is the desirable boost switching frequency (Hz)
- R FSW is resistor from FSW pin to GND ( Ω)
Inductor
Choose the inductance according to Table 4:
TABLE 4. INDUCTOR SELECTION
INDUCTANCE
Output Capacitor
It is recommended that a two of 4.7μF X5R/X7R or equivalent
ceramic output capacitor is used.
Schottky Diode
The Schottky diode should be rated for at least the same forward
current as the inductor, and for a reverse voltage equal to at least
the maximum output voltage, OVP.
Compensation
The ISL97692/3/4A’s boost regulator uses a current mode
control architecture with a standardized external compensation
network connected to the COMP pin. The component values
shown in the “Typical Application Circuits” on page 2, should be
used. The network comprises a series RC of 12k ? and 15nF from
COMP to GND.
Applications
Unused LED Channels
Connect unused LED channels to GND.
High Current Applications
Each channel of the ISL97692 supports 40mA continuous sink
current. Each channel of the ISL97693/4A supports 30mA
continuous sink current. For applications that need higher
current, multiple channels can be paralleled (Tables 5 and 6).
BOOST FREQUENCY
400kHz to 700kHz
(μH)
10 to 15
TABLE 5. PARALLELING ISL97692 CHANNELS FOR HIGHER
CURRENT
700kHz to 1MHz
1MHz to 1.5MHz
1.5MHz
6.8 to 10
4.7 to 8.2
3.3 to 4.7
TOTAL
CHANNELS
4
2
CHANNEL
CURRENT
40mA per channel
80mA per channel
CHANNEL CONNECTIONS
CH1, CH2, CH3, CH4
{CH1 & CH2}, {CH3 & CH4}
The inductor saturation current rating should be as provided by
1
160mA
{CH1 & CH2 & CH3 & CH4}
Equation 16:
1.35 × V OUT × I LED
I L = -----------------------------------------------------
V IN
(EQ. 16)
TABLE 6. PARALLELING ISL97693/4A CHANNELS FOR HIGHER
CURRENT
Where:
- I L is the minimum inductor saturation current rating (A)
- V OUT is the maximum output voltage set by OVP (V)
- I LED is the sum of the channel currents (A)
- VIN is the minimum input voltage (V)
If the calculation produces a current rating higher than the 3.08A
maximum boost switch current limit, then a 3A inductor current
rating is adequate.
TOTAL
CHANNELS
6
3
2
1
CHANNEL
CURRENT
30mA per channel
60mA per channel
90mA per channel
180mA
CHANNEL CONNECTIONS
CH1, CH2, CH3, CH4, CH5, CH6
{CH1 & CH2}, {CH3 & CH4},
{CH5 & CH6}
{CH1 & CH2 & CH3},
{CH4 & CH5 & CH6}
{CH1 & CH2 & CH3 & CH4 &
For example, for a system using 4 LED channels with 30mA per
channel and a maximum output voltage (OVP) of 24.53V with an
input supply of 2.7V minimum as shown by Equation 17:
CH5 & CH6}
Figure 31 shows CH1 and CH2 paralleled.
I L = ----------------------------------------------------------------- = 1.47A
1.35 × 24.53 × ( 4 × 0.03 )
2.7
21
(EQ. 17)
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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