MAX14900E Datasheet, PDF (1/31 Pages) Maxim Integrated Products – Global and Per-Channel Diagnostics

MAX14900E
EVALUATION KIT AVAILABLE
Octal, High-Speed, Industrial, High-Side Switch
General Description
The MAX14900E is an octal power switch that
features per-channel configuration for high-side or push-
pull operation. Low propagation delay, high-rate load-
switching makes the device suitable for next-generation
high-speed PLC systems. Each high-side switch sources
850mA continuous current with a low 165mΩ (max)
on-resistance at 500mA at T_A = +125°C. The high-side
switches feature 2µs (max) input-to-output propagation
delay when driving resistive loads. Long cables can be
driven with switching rates of up to 100kHz for PWM/PPO
control in push-pull operation. Multiple high-side switches
can be connected in parallel to achieve higher drive
currents. The device features a wide supply input range
of 10V to 36V.
The MAX14900E is configured, monitored, and driven by
an SPI and/or parallel interface. In parallel mode, eight
logic inputs directly control the outputs and the serial
interface can be used for configuration/monitoring. Serial
mode utilizes the serial interface for both setting and
configuration, and features CRC error detection to ensure
robust SPI communication.
Current limiting and per-channel thermal shutdown
protect each switch/driver. The device features a global
diagnostics output as well as per-channel diagnostics and
monitoring through the serial interface.
The MAX14900E is available in a 48-pin (7mm x 7mm)
QFN-EP or standard 48-pin TQFN-EP package, and is
specified over the -40°C to +125°C temperature range.
Applications
●● Programmable Logic Controllers
●● High-Density Digital Output Modules
●● Motor Controllers
●● PWM/PPO Control
Ordering Information and Typical Operating Circuit appear
at end of data sheet.
Benefits and Features
●● Low Power for High-Density Modules
• 3mA (max) Total Supply Current
• 165mΩ (max) High-Side R_ON at +125°C
●● Fast Switching Ideal for Accurate, High-Speed
Control Systems
• 2µs Propagation Delays (High-Side Mode)
• 0.8µs Propagation Delays (Push-Pull Mode)
• 100kHz (max) Push-Pull Mode Switching Rate
●● Extensive Fault Feedback Eases Maintenance and
Reduces Installation Time
• Global and Per-Channel Diagnostics
• Open Load/Wire Detection
• Thermal Shutdown Fault Indication
• Output Logic State Feedback
• Undervoltage Lockout
●● Small Packages with Serial Interface Allows Making
High-Density Modules
• Daisy-Chainable SPI Minimizes Isolation Cost
• 7mm x 7mm, 48-Pin QFN and TQFN Packages
Functional Diagram
VL
V5
VDD
FLTR
VL V5
VDD
VDD
PUSHPL
OL/IN1
UV MONITOR
DRIVE + MONITOR ^O8
O8
EN
VDD
IN2
CRC/IN3
CERR/IN4
IN5
IN6
CNFG/IN7
PARALLEL
INTERFACE
MAX14900E
DRIVE + MONITOR ^O7
EN
O7
VDD
DRIVE + MONITOR ^O6
O6
EN
VDD
S16/IN8
SRIAL
CS
CLK
SDI
SERIAL
INTERFACE
CONFIG
AND
SETTING
DRIVE + MONITOR ^O5
EN
O5
VDD
DRIVE + MONITOR ^O4
O4
VDD
EN
DRIVE + MONITOR ^O3
O3
SDO
EN
VDD
DRIVE + MONITOR ^O2
O2
OVERLOAD
VDD
FAULT
REXT
DIAGNOSTICS
OVERTEMP
OPEN LOAD
DRIVE + MONITOR ^O1
O1
EN
AGND
PGND
19-6563; Rev 4; 4/15