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| 型号： | CAT4104V-GT3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 3/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR 4CH 175MA 8SOIC |
| 标准包装： | 3,000 |
| 恒定电流： | 是 |
| 拓扑： | PWM |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 汽车，背光，通用型 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 电源电压： | 3 V ~ 5.5 V |
| 输出电压： | 25V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | CAT4104V-GT3-ND CAT4104V-GT3OSTR |
CAT4104
Table 4. RECOMMENDED EN/PWM TIMING (Min and Max values are over the recommended operating conditions unless
specified otherwise. Typical values are at VIN = 5.0 V, T AMB = 25 ° C.)
Symbol
T PS
T P1
T P2
Name
Turn ? On time, EN/PWM rising to I LED from
shutdown
Turn ? On time, EN/PWM rising to I LED
Turn ? Off time, EN/PWM falling to I LED
Conditions
I LED = 175 mA
I LED = 80 mA
I LED = 175 mA
I LED = 175 mA
Min
Typ
1.5
1.3
600
400
Max
Units
m s
ns
ns
I LED = 80 mA
300
T R
LED rise time
I LED = 175 mA
700
ns
I LED = 80 mA
440
T F
LED fall time
I LED = 175 mA
360
ns
I LED = 80 mA
320
T LO
T HI
EN/PWM low time
EN/PWM high time
1
5
m s
m s
T PWRDWN
EN/PWM low time to shutdown delay
4
8
ms
EN/PWM
T HI
T LO
T PWRDWN
SHUTDOWN
POWERDOWN
SHUTDOWN 0 mA
T PS
T P2
T P1 T R
T F
I LED +
1.2 V
R SET
100
LED CURRENT
SHUTDOWN 0 mA
50%
50%
90%
10%
0 mA
QUIESCENT CURRENT
SHUTDOWN 0 mA
EN/PWM Operation
Figure 2. CAT4104 EN/PWM Timing
SHUTDOWN 0 mA
The EN/PWM pin has two primary functions. One
function enables and disables the device. The other function
turns the LED channels on and off for PWM dimming
control. The device has a very fast turn ? on time (from
EN/PWM rising to LED on) and allows “instant on” when
dimming LED using a PWM signal.
Accurate linear dimming is compatible with PWM
frequencies from 100 Hz to 5 kHz for PWM duty cycle
down to 1%. PWM frequencies up to 50 kHz can be
When performing a combination of low frequencies and
small duty cycles, the device may enter shutdown mode.
This has no effect on the dimming accuracy, because the
turn ? on time T PS is very short, in the range of 1 m s.
To ensure that PWM pulses are recognized, pulse width
low time T LO should be longer than 1 m s. The CAT4104
enters a “zero current” shutdown mode after a 4 ms delay
(typical) when EN/PWM is held low.
supported for duty cycles greater than 10%.
http://onsemi.com
3
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