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參數(shù)資料
| 型號： | CAT3612 |
| 英文描述： | Programmable 300mA Camera Flash LED Driver |
| 中文描述： | 可編程的300mA相機閃光燈LED驅(qū)動器 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大小： | 461K |
| 代理商： | CAT3612 |
CAT3612
Doc. No. 5016 Rev. A
8
2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
PIN DESCRIPTIONS
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
TAB
Name
VIN
C1+
C1-
C2-
GND
LED1
LED2
C2+
-
EN/DIM
-
VOUT
TAB
Function
Supply voltage.
Bucket capacitor 1 terminal
Bucket capacitor 1 terminal
Bucket capacitor 2 terminal
Ground reference
LED1 cathode terminal (if not used, connect to VOUT)
1
.
LED2 cathode terminal (if not used, connect to VOUT)
1
.
Bucket capacitor 2 terminal
Not connected
Device enable (active high) and dimming control input.
Not connected
Charge pump output connected to the LED anodes.
Connect to GND on the PCB.
Note 1:
LED1, LED2 pins should not be left floating. They should be connected to the LED cathode, or tied to the VOUT pin if not used.
PIN FUNCTION
VIN
is the supply pin for the device. A small 1
μ
F
ceramic bypass capacitor is required between the VIN
pin and ground near the device. The operating input
voltage range is up to 5.5V. When the input supply
falls below the undervoltage threshold (2V), all LEDs
channels are disabled.
EN/DIM
is the enable and dimming control logic input
for all LED channels. Guaranteed levels of logic high
and logic low are set at 1.3V and 0.4V respectively.
When EN/DIM is initially taken high, the device
becomes enabled and the LED currents remain at
0mA. The falling edge of the first pulse on EN/DIM
sets the LED currents to the full scale 150mA.
On each consecutive falling edge of the pulse on
EN/DIM, the LED current decreases by 150/31mA. On
the 32
nd
pulse, the LED current is set to zero. The
next pulse on EN/DIM resets the current back to full
scale 150mA.
To place the device into zero current shutdown mode,
the EN/DIM pin must be held low for 1.5ms or more.
VOUT
is the charge pump output that is connected to
the LED anodes. A small 1
μ
F ceramic bypass
capacitor is required between the VOUT pin and
ground near the device.
GND
is the ground reference for the charge pump. The
pin must be connected to the ground plane on the PCB.
C1+, C1-
are connected to each side of the 1
μ
F
ceramic bucket capacitor C1.
C2+, C2-
are connected to each side of the 1
μ
F
ceramic bucket capacitor C2.
LED1, LED2
provide the internal regulated current for
each of the LED cathodes. These pins enter a high
impedance zero current state whenever the device is in
shutdown mode. In applications using only one LED
channel, the unused channel should be tied directly to
VOUT. The disabled channel only draws about 0.5mA.
TAB
is the exposed pad underneath the package. For
best thermal performance, the tab should be soldered
to the PCB and connected to the ground plane.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT3612_08 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Programmable 300mA Camera Flash LED Driver |
| CAT3612HV2-GT2 | 功能描述:LED照明驅(qū)動器 LED Driver,Charge pump,2 ch RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| CAT3612HV2-T2 | 功能描述:LED照明驅(qū)動器 Prog Camera Flash LED Driver RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| CAT3614 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Channel 1-Wire LED Driver in 3x3mm Package |
| CAT3614_08 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:4-Channel 1-Wire LED Driver in 3 x 3mm Package |
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