- 您现在的位置：买卖IC网 > PDF目录10252 > SI8244CB-C-IS1 (Silicon Laboratories Inc)IC AUDIO DRIVER PWM 16-SOIC PDF资料下载
参数资料
| 型号： | SI8244CB-C-IS1 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 10/30页 |
| 文件大小： | 0K |
| 描述： | IC AUDIO DRIVER PWM 16-SOIC |
| 标准包装： | 48 |
| 类型： | 音频驱动器 |
| 应用： | D 类音频放大器 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC N |
| 包装： | 管件 |
| 其它名称： | 336-2000-5 SI8244CB-B-IS1 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
Si824x
18
Rev. 1.0
3.4. Power Supply Connections
Isolation requirements mandate individual supplies for VDDI, VDDA, and VDDB. The decoupling caps for these
supplies must be placed as close to the VDD and GND pins of the Si824x as possible. The optimum values for
these capacitors depend on load current and the distance between the chip and the regulator that powers it. Low
effective series resistance (ESR) capacitors, such as Tantalum, are recommended.
3.5. Power Dissipation Considerations
Proper system design must assure that the Si824x operates within safe thermal limits across the entire load range.
The Si824x total power dissipation is the sum of the power dissipated by bias supply current, internal switching
losses, and power delivered to the load. Equation 1 shows total Si824x power dissipation. In a non-overlapping
system, such as a high-side/low-side driver, n = 1.
Equation 1.
The maximum power dissipation allowable for the Si824x is a function of the package thermal resistance, ambient
temperature, and maximum allowable junction temperature, as shown in Equation 2:
Equation 2.
Substituting values for PDmax Tjmax, TA, and ja into Equation 2 results in a maximum allowable total power
dissipation of 1.19 W. Maximum allowable load is found by substituting this limit and the appropriate datasheet
values from Table 1 on page 5 into Equation 1 and simplifying. The result is Equation 3 (0.5 A driver) and
Equation 4 (4.0 A driver), both of which assume VDDI = 5 V and VDDA = VDDB = 18 V.
Equation 3.
Equation 4.
P
D
V
DDIIDDI
2V
DDOIQOUT
C
intVDDO
2
F
+
2n C
LVDDO
2
F
++
where:
P
D is the total Si824x device power dissipation (W)
I
DDI is the input-side maximum bias current (3 mA)
I
QOUT is the driver die maximum bias current (2.5 mA)
C
int is the internal parasitic capacitance (75 pF for the 0.5 A driver and 370 pF for the 4.0 A driver)
V
DDI is the input-side VDD supply voltage (4.5 to 5.5 V)
V
DDO is the driver-side supply voltage (10 to 24 V)
F is the switching frequency (Hz)
n is the overlap constant (max value = 2)
=
P
Dmax
T
jmax
T
A
–
ja
---------------------------
where:
P
Dmax = Maximum Si824x power dissipation (W)
T
jmax = Si824x maximum junction temperature (150 °C)
T
A = Ambient temperature (°C)
ja = Si824x junction-to-air thermal resistance (105 °C/W)
F = Si824x switching frequency (Hz)
C
L(MAX)
1.4
10
3
–
F
--------------------------
7.5
–
10
11
–
=
C
L(MAX)
1.4
10
3
–
F
--------------------------
3.7
–
10
–
=
相关PDF资料 |
PDF描述 |
|---|---|
| MS27467E9B44S | CONN PLUG 4POS STRAIGHT W/SCKT |
| SI8244BB-C-IS1 | IC AUDIO DRIVER PWM 16-SOIC |
| MS27468T17A35S | CONN RCPT 55POS JAM NUT W/SCKT |
| MS27497T24F61P | CONN RCPT 61POS WALL MNT W/PINS |
| VE-26D-MY | CONVERTER MOD DC/DC 85V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SI8244CB-C-IS1R | 制造商:Silicon Laboratories Inc 功能描述:CLASS D AUDIO DRIVER - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC AUDIO DRIVER PWM 16-SOIC 制造商:Silicon Laboratories Inc 功能描述:2.5kV 4A "D" Audio 10V UVLO PWM input |
| SI824X_11 | 制造商:SILABS 制造商全称:SILABS 功能描述:CLASS D AUDIO DRIVER WITH PRECISION DEAD-TIME GENERATOR |
| Si824xClassD-KIT | 功能描述:音频 IC 开发工具 Audio Class D Ref. Design using Si824x RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| SI8250 | 制造商:SILABS 制造商全称:SILABS 功能描述:DIGITAL POWER CONTROLLER |
| SI8250DK | 功能描述:电源管理IC开发工具 Development kit for Si8250/1/2 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
发布紧急采购，3分钟左右您将得到回复。