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参数资料
| 型号： | AS1112C-BQFT |
| 厂商： | ams |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER LED 16CHAN 32-TQFN |
| 标准包装： | 1,000 |
| 恒定电流： | 是 |
| 拓扑： | PWM |
| 输出数： | 16 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，通用 |
| 类型 - 次要： | 颜色 |
| 频率： | 30MHz |
| 电源电压： | 3 V ~ 5.5 V |
| 输出电压： | 15V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN（5x5） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
AS1112
Datasheet - D e t a i l e d D e s c r i p t i o n
Figure 10. Error Detection Timing (GS=FFFF HEX , DC=3F HEX )
LD
>1μs
OEN
GSCLK
SID
Error
Detection
Start
LOD n , LSD n
LOD n+1 , LSD n+1
Error
Detection
End
Note: The rising edge of LD latches new data into the internal registers depending on the logic level of the pin MODE. If the pin MODE is tied
GND, the greyscale registers are updated. If the pin MODE is tied to V CC , the dot correction registers are updated.
Delay Between Outputs (only for AS1112 and AS1112B)
The AS1112 uses graduated delay circuits between OUT n outputs. These circuits are contained in the constant-current driver block of the
AS1112 (see Figure 1 on page 1) . The average-delay time is 30ns (typ).
The maximum delay is 450ns (typ) from OUT0 to OUT15. The delay scheme works by switching on and switching off each output channel. Thus
the on/off time of each channel is the same regardless of the delay. These delays prevent large inrush currents and switching noise that can
reduce bypass capacitance when the outputs are switched on.
OUT n Enable
All OUT n channels can be collectively switched off with one signal. When OEN is set to 1, all OUT n channels are disabled, regardless of the
device logic operations. The greyscale counter is also reset when OEN is set to 1.
When OEN is set to 0, all OUT n channels are in normal operation.
Table 9. Pin OEN Truth Table
OEN
0
1
OUT0:OUT15
Normal Operation
Disabled
Setting Maximum Channel Current
The maximum output current per channel is programmed by a single resistor, R IREF , which is placed between pin I REF and GND. The voltage
on pin I REF is set by an internal band gap V IREF (1.24V typ). The maximum channel current is equivalent to the current flowing through R IREF
multiplied by a factor of 31.5. The maximum output current is calculated as:
I MAX =
V IREF
x 31.5
(EQ 1)
R IREF
Where:
V IREF = 1.24V;
R IREF = User-selected external resistor.
Figure 7 on page 7 shows the maximum output current I OUT versus R IREF , where R IREF is the value of the resistor between I REF terminal to
GND, and I OUT is the constant output current of OUT0:OUT15.
www.austriamicrosystems.com/LED-Driver-ICs/AS1112
Revision 1.13
10 - 19
相关PDF资料 |
PDF描述 |
|---|---|
| AS1113-BSST | IC DRIVER LED 16-CHAN 24-SSOP |
| AS1117-BQFT | IC DRIVER 64LED MOBILE 24-TQFN |
| AS1118-BQFT | IC DRIVER 64LED W/DELAY 24-TQFN |
| AS1121B-BQFT | IC DRIVER 16-CH 32-TQFN |
| AS1122B-BQFT | IC LED DVR 12-CH 24-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1112-EB | 制造商:ams 功能描述:AS1112 Evaluation Board |
| AS1112-XXX-I-A1-D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1112-XXX-I-A1-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1112-XXX-I-A2-D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
| AS1112-XXX-I-A2-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Filter |
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