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参数资料
| 型号： | CAT3604VHV4-GT2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR WHT CLR BACKLT 16TQFN |
| 标准包装： | 1 |
| 系列： | QUAD-Mode® |
| 拓扑： | PWM，切换式电容器（充电泵） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 频率： | 800kHz ~ 1.3MHz |
| 电源电压： | 2.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN（4x4） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 805 (CN2011-ZH PDF) |
| 其它名称： | CAT3604VHV4-GT2DKR |
CAT3604V
device runs diagnostics and goes to 1x mode where the
output is basically equal to the input voltage.
As soon as the output exceeds about 6 V, the driver resets
itself and reevaluate the mode.
If the die temperature reaches +150 ° C, the device enters
a thermal protection shutdown mode. When the device
temperature drops to about +130 ° C, the device resumes
normal operation.
LED Selection
LEDs with forward voltages (V F ) ranging from 1.3 V to
4.3 V may be used. Selecting LEDs with lower V F is
recommended in order to extend battery life and keep the
driver in 1x mode longer as the battery voltage decreases.
For example, if a 3.3 V V F LED is selected instead of a
3.5 V V F LED, the driver will stay in 1x mode for a lower
supply voltage of 0.2 V.
External Components
The driver requires four external 1 m F ceramic capacitors
for decoupling input, output, and for the charge pump. Both
capacitors type X5R and X7R are recommended for the
LED driver application. In all charge pump modes, the input
current ripple is kept very low by design and an input bypass
PWM Dimming
The EN pin is used to provide total Shutdown of the device
as well as High Resolution PWM dimming control on the
LED Channels.
Shutdown of the device occurs after the EN pin has been
held low for 1.5 ms. During the “soft ? start” power ? up
sequence from the shutdown mode, the LED current
typically settles within 40 m s (for 1X mode operation). This
LED current settling time becomes 400 m s if 1.33X
operation is needed (i.e low battery voltage).
For High Resolution PWM dimming control (typically
frequencies at 2 kHz or above), the device will remain
powered and only the LED channels output will be switched
on and off during the PWM (the rest of the device will
remain powered ? up). This allows the output channels to
have “instant ? on” response, where the LED current settles
within 1 m s of the applied PWM dimming signals. This
“instant ? on” modes makes the device suitable for extremely
high frequency PWM dimming schemes.
Figure 28 shows the output current for PWM frequencies
up to 100 kHz and with duty cycles of 30% and 70%.
100
capacitor of 1 m F is sufficient.
In 1x mode, the device operates in linear mode and does
not introduce switching noise back onto the supply.
Recommended Layout
In charge pump mode, the driver switches internally at a
high frequency. It is recommended to minimize trace length
to all four capacitors. A ground plane should cover the area
under the driver IC as well as the bypass capacitors. Short
connection to ground on capacitors C IN and C OUT can be
implemented with the use of multiple via. A copper area
90
80
70
60
50
40
30
20
70% DC
30% DC
matching the TQFN exposed pad (TAB) must be connected
to the ground plane underneath. The use of multiple via
10
0.1
1
10
100
improves the package heat dissipation.
PWM FREQUENCY (kHz)
Figure 28. Output Current vs. PWM Frequency
For best performance, the duty cycle off ? time T OFF
should meet the following timing limits:
? for slow frequency ≤ 600 Hz, T OFF ≥ 800 m s
? for fast frequency ≥ 1 kHz, T OFF ≤ 400 m s
Figure 27. PCB Layout
http://onsemi.com
11
相关PDF资料 |
PDF描述 |
|---|---|
| CAT3606HV4-T2 | IC LED DRVR WHITE BCKLGT 16-TQFN |
| CAT3614HV2-T2 | IC LED DRVR WHITE BCKLGT 12-TDFN |
| CAT3616HV4-GT2 | IC LED DRVR WHITE BCKLGT 16-TQFN |
| CAT3636HV3-GT2 | IC LED DVR 6CH QUAD MODE 16TQFN |
| CAT3643HV2-T2 | IC LED DRVR WHITE BCKLGT 12-TDFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT3604VHV4-T2 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:4-Channel Quad-Mode⑩ LED Driver with Open/Short LED Detection |
| CAT3604VHV9-A3 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT3606 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:6-Channel Low Noise Charge Pump White LED Driver |
| CAT3606_08 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:6-Channel Low Noise Charge Pump White LED Driver |
| CAT3606HS4 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:6-Channel Low Noise Charge Pump White LED Driver |
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