General Description

The MAX22200 is an octal 36V serial-controlled solenoid

driver. Each channel features a low impedance (200mΩ

typ) push-pull output stage with sink-and-source driving

capability and up to 1ARMS driving current. A serial interface

(SPI) that also supports daisy-chain configurations is

provided to individually control each channel.

The device half-bridges can be configured as low-side

drivers or as high-side drivers. Moreover, pairs of halfbridges

can be paralleled to double the driving current or

can be configured as full-bridges to drive up to four latched

valves (bi-stable valves) or four brushed DC motors.

Two control methods are supported: voltage drive regulation

(VDR) and current drive regulation (CDR). In VDR,

the device outputs a PWM voltage in which the duty cycle

is programmed using SPI. For a given supply voltage and

solenoid resistor, the output current is proportional to the

programmed duty cycle. In CDR, an internal integrated

lossless current sensing (ICS) circuit senses the output

current and compares it with an internal programmable

reference current.

For optimal power management in solenoid drive applications,

the excitation drive level (IHIT), the hold drive level

(IHOLD), and the excitation drive time (tHIT) can be individually

configured for each channel.

The MAX22200 features a full set of protections and diagnostic

functions. This includes overcurrent protection

(OCP), thermal shutdown (TSD), undervoltage Lockout

(UVLO), open-load detection (OL), and detection of

plunger movement (DPM). A fault indication pin (FAULT)

signals fault events and diagnostic information is stored in

the FAULT register.

Due to the flexibility of use, the serial interface control,

the high efficiency, and the small package, the MAX22200

is particularly well-suited for solenoid driver applications

(valve control, relays control etc.) in which low power consumption

and high level of integration are required.

The MAX22200 is available in a compact 5mm x 5mm,

32-pin TQFN package and operates over the temperature -40ºC to +85ºC range.

Benefits and Features

● Eight Half-Bridges Up To +36V

● High Performances:

• Low On-Resistance: RDS(on): 200 mΩ typical (TA =

+25°C)

• Continuous Output Current Up To 1ARMS per Half-

Bridge (TA = +25°C)

• Current-Drive Regulation (CDR)

• Voltage-Drive Regulation (VDR)

• Integrated Lossless Current Sensing (ICS)

● High Flexibility:

• Independent Programmable HIT and HOLD

Currents for Each Channel (IHIT, IHOLD)

• Independent Programmable HIT Current Timing for

Each Channel (tHIT)

• Full-Bridge Configuration Supported

• Parallel Mode Supported

● High Speed Serial Interface (SPI)

• 5MHz Daisy-Chain Configuration

• 10MHz without Daisy Chain

● Protections and Diagnostic

• Overcurrent Protection (OCP)

• Open-Load Detection (OL)

• Detection of Plunger Movement (DPM)

• Undervoltage Lockout (UVLO)

• HIT Current Not Reached (HHF)

• Thermal Shutdown T = +145°C (TSD)

• Fault Registers for Diagnostic purposes

● Integration:

• 32 TQFN 5mm x 5mm Package

Applications

● Relays Driver

● Solenoid, Valves, Electromagnetic Drivers

● Generic Low-Side and High-Side Switch Applications

● Latched (Bi-Stable) Solenoid Valve Drivers

● Brushed DC Motor Driver