參數資料
型號： SI3232DC0-EVB
廠商： Silicon Laboratories Inc
文件頁數： 68/128頁
文件大?。?/td> 0K
描述： DAUGHTER CARD W/SI3200 INTERFACE
標準包裝： 1
系列： ProSLIC®
主要目的： 接口，模擬前端（AFE）
已用 IC / 零件： Si3232
已供物品： 板，CD
Si3232
44
Preliminary Rev. 0.96
Not
Recommended
fo
r N
ew
D
esi
gn
s
4.12. Relay Driver Considerations
The Si3232 includes a general-purpose driver output for
each channel (GPOa, GPOb) to drive external test
relays. In most applications, the relay can be driven
directly from the Si3232 with no external relay drive
circuitry required. Figure 21 illustrates the internal relay
driver circuitry using a 3 V relay.
Figure 21. Si3232 Internal Relay Drive Circuitry
The internal driver logic and drive circuitry is powered
from the same 3.3 V supply as the chip’s main supply
(VDD1–VDD4 pins). When operating external relays
from a VCC supply that is equal to the chip’s VDD supply,
an internal diode network provides protection against
overvoltage conditions caused by flyback spikes when
the relay is opened. Only 3 V relays may be used in the
configuration shown in Figure 21, and either polarized
or non-polarized relays are acceptable provided both
VCC and VDD are powered by a 3.3 V supply. The input
impedance, RIN, of the relay driver pins is a constant
11
while sinking less than the maximum rated 85 mA
into the pin.
If the desired operating voltage of the relay, VCC, is
higher than the Si3232’s VDD supply voltage, an
external drive circuit is required to eliminate leakage
from VCC to VDD through the internal protection diode.
In this configuration, a polarized relay is recommended
to provide optimal overvoltage protection with minimal
external components. Figure 22 illustrates the required
external
drive
circuit,
and
provides
recommended
values
for
RDRV for typical relay
characteristics
and
VCC
supplies.
The
output
impedance, ROUT, of the relay driver pins is a constant
63
while sourcing less than the maximum rated
28 mA out of the pin.
Figure 22. Driving Relays with VCC > VDD
The maximum allowable RDRV value can be calculated
using the following equation:
where
Q1,MIN ~ 30 for a 2N2222
Si3232
Relay
Driver
Logic
V
DD
GND
GPOa/b
V
CC
3 V/5 V Relay
(polarized or
non-polarized)
Table 26. Recommended RDRV Values
ProSLIC
VDD
Relay
VCC
Relay
RCOIL
Maximum
RDRV
Recom-
mended
5% Value
3.3 V
±5%
3.3 V
±5%
64
Not
Required
—
3.3 V
±5%
5V
±5%
178
2718
2.7 k
3.3 V
±5%
12 V
±10%
1028
6037
5.6 k
3.3 V
±5%
24 V
±10%
2880
8364
8.2 k
3.3 V
±5%
48 V
±10%
7680
11092
11 k
Si3232
V
DD
GPOa
GPOb
V
CC
Polarized
relay
R
DRV
I
DRV
Q1
MaxR
DRV
V
DD,MIN
0.6 V
–
R
RELAY
Q1,MIN
V
CC,MAX
0.3 V
–
-------------------------------------------------------------------------------------------------
R
SOURCE
–
=
相關PDF資料
PDF描述
UPZ2D391MHD CAP ALUM 390UF 200V 20% RADIAL
SI3230PPQX-EVB BOARD EVAL W/DISCRETE INTERFACE
M3UFK-1636R IDC CABLE - MKS16K/MC16M/MCF16K
A3RRB-1018G IDC CABLE - APR10B/AE10G/APR10B
SI3225PPTX-EVB BOARD EVAL W/DISCRETE INTERFACE
相關代理商/技術參數
參數描述
SI3232DCX-EVB 功能描述:子卡和OEM板 Si3232 DAUGHTER CARD RoHS:否 制造商:BeagleBoard by CircuitCo 產品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
SI3232-FQ 功能描述:電信線路管理 IC DUAL CH SLIC RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
SI3232-FQR 制造商:Silicon Laboratories Inc 功能描述:
SI3232-G-FQ 功能描述:電信線路管理 IC Dual-Channel SLIC RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
SI3232-G-FQR 功能描述:電信線路管理 IC Dual-CH SLIC only Internal 65 Vrms RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數量 廠商 批號 封裝
添加更多采購

我的聯系方式

*
*
*