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参数资料
| 型号： | MAX13487EEVKIT# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/8页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX13487E |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 接口，数字线缆驱动器 |
| 已用 IC / 零件： | MAX13487E |
| 已供物品： | 板 |
MAX13487E Evaluation Kit
The EV kit input power is typically a +5V DC source that
provides at least 450mA of current to the MAX256 inte-
grated primary-side controller and H-bridge driver cir-
cuit. The MAX256 contains an on-board oscillator, pro-
tection circuitry, and internal H-bridge FETs to provide
power to the primary of the transformer T1. The MAX256
prevents cross conduction of the H-bridge MOSFETs by
implementing break-before-make switching. The
MAX256 programmable oscillator is programmed to
420kHz by resistor R1. The switching-frequency duty
cycle is fixed at 50% to control energy transfer to trans-
former T1 isolated output.
The MAX256 IC includes UVLO for controlled startup
and provides controlled turn-on during power-up and
during brownouts. If the input voltage at VIN falls below
1.9V (typ), the MAX256 IC will shut down.
Surface-mount transformer T1 provides galvanic isola-
tion and the VOUT output is powered from a center-
tapped full-wave rectifier circuit (D1 or D2) to reduce
output-voltage ripple. It feeds a MAX1659 LDO regula-
tor configured for +5V output. The LDO output is
current limited and features thermal shutdown to pro-
vide for a robust isolated supply at VOUT, which can
provide up to 300mA of current.
The two-layer PCB is designed for 2500V RMS isolation,
with 300 mils spacing between the PGND and GND
planes. The bottom PCB PGND plane under U2 is uti-
lized as a thermal heat sink for power dissipation of the
MAX256 thermally enhanced SO package. Test points
TP1 (PGND) and TP2 (GND) are provided on the PCB
for probing the respective ground plane or to connect
the PGND to GND planes for nonisolated evaluation of
the circuit.
Jumper Selection
The MAX13487E EV kit features several jumpers to
reconfigure the receiver/driver enable circuits, and shut-
down for the MAX256 and MAX13487E ICs. Additionally,
PCB pads are provided for connecting an external load
to the isolated +5V output at VOUT and GND.
Shutdown Control
The MAX13487E EV kit features two jumpers that con-
figure the shutdown mode of the circuit. Jumper JU1
configures the MAX256 DC-DC converter and JU2 con-
figures the MAX13487E IC for shutdown mode. See
Table 1 for placing the EV kit circuit or the desired IC in
shutdown mode.
AutoDirection and Receiver Enable Selection
The MAX13487E EV kit features a 2-pin jumper (JU3) to
set the MAX13487E receiver mode of operation,
AutoDirection, or receiver output enabled. Refer to the
AutoDirection Circuitry section in the MAX13487E/
MAX13488E IC data sheet for more information on the
MAX13487E RE pin modes of operation. See Table 2
for configuring the receiver mode of operation using
jumper JU3.
Table 1. JU1 and JU2 Shutdown Mode Control
JU1 SHUNT
POSITION
Not installed
Installed
Not installed
MAX256 MODE PIN
Connected to VIN through R2
Connected to PGND
Connected to VIN through R2
JU2 SHUNT
POSITION
1-2
2-3
2-3
MAX13487E SHDN PIN
Connected to VOUT
Connected to GND
Connected to GND
EV KIT OPERATION MODE
All ICs operational
Shutdown
MAX13487E shutdown, all other
ICs operational
Table 2. Driver and Receiver JU3 Functions
SHUNT POSITION
Installed
Not installed
RE PIN
Connected to VOUT
Connected to GND through R9
MAX13487E AUTODIRECTION OR RECEIVER MODE
AutoDirection enabled*
Receiver RO output enabled
*To avoid bus contention, ensure that only one driver has control of the bus at a time.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX13487EEVKIT# | 功能描述:界面开发工具 MAX13487E Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| MAX13488EESA+ | 功能描述:RS-422/RS-485 接口 IC Half-Dplx RS-485/422 5V 16Msps LD/Rc RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
| MAX13488EESA+T | 功能描述:RS-422/RS-485 接口 IC Half-Dplx RS-485/422 5V 16Msps LD/Rc RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
| MAX1348BETX | 功能描述:ADC / DAC多通道 RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| MAX1348BETX+ | 功能描述:ADC / DAC多通道 12-Bit 4Ch 300ksps 5.25 Precision ADC RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
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