MAXIM Manuals

The DS2714 is ideal for standalone charging of 1 to 4 AA or AAA NiMH “loose” cells. NiCd cells can also be charged. Temperature, voltage and charge time are monitored to provide proper fast charging control algorithms for Nickel Metal Hydride (NiMH) batteries. Battery tests are included to detect defective or inappropriate cells such as Alkaline primary batteries. The DS2714 supports a parallel charging topology, with independent monitoring and control of each cell.

The MAX5098A is a dual-output, high-switching-frequency DC-DC converter with integrated N-channel switches that can be used either in high-side or low-side configuration. Each output can be configured either as a buck converter or a boost converter. In the buck configuration, this device delivers up to 2A from converter 1 and 1A from converter 2. The MAX5098A also integrates a load-dump protection circuitry that is capable of handling load-dump transients up to 80V for automotive applications. The load-dump protection circuit utilizes an internal charge-pump to drive the gate of an external N-channel MOSFET. When an overvoltage or load-dump condition occurs, the series protection MOSFET absorbs the high voltage transient to prevent damage to lower voltage components. The DC-DC converters operate over a wide operating voltage range from 4.5V to 19V. The MAX5098A operates 180° out-of-phase with an adjustable switching frequency to minimize external components while allowing the ability to make trade-offs between the size, efficiency, and cost. The high switching frequency (up to 2.2MHz) also allows this device to operate outside the AM band for automotive applications. This device utilizes voltage-mode control for stable operation and external compensation, thus the loop gain is tailored to optimize component selection and transient response. This device can be synchronized to an external clock fed at the SYNC input. Also, a clock output (CK) is provided.

The DS80C310 is a fast 80C31/80C32-compatible microcontroller

The MAX6955 is a compact display driver that interfaces microprocessors to a mix of 7-segment, 14-segment, and 16-segment LED displays through an I2C-compati- ble 2-wire serial interface. The MAX6955 drives up to 16 digits 7-segment, 8 digits 14-segment, 8 digits 16-seg- ment, or 128 discrete LEDs, while functioning from a supply voltage as low as 2.7V.

MAX8678 is an integrated white LED charge pump with an audio loudspeaker amplifier. It has high efficiency, adaptive mode switching, and can drive multiple LEDs with constant current for uniform brightness. Through a single-wire serial-pulse interface, the LED current can be adjusted in the range of 0.1mA-24mA in 31 pseudo-logarithmic steps, and the LED current is accurate and well matched throughout the adjustment range. MAX8678 also integrates a single-channel AB class audio amplifier, which can directly drive an 8Ω loudspeaker and obtain 1.1W RMS continuous output power from a 5V power supply with a THD+N of less than 1%. The gain can be adjusted in the range of -9dB to +18dB in ten 3dB steps through a single-wire serial-pulse interface. MAX8678 also has soft-start, thermal shutdown, open-circuit and short-circuit protection, and is packaged in a 16-pin, 3mm x 3mm Thin QFN package (maximum height of 0.8mm).

The MAX6971 is a serial-interfaced LED driver that provides 16 open-drain, constant-current-sinking LED driver outputs rated at 36V. The MAX6971 operates from a 3V to 5.5V supply. The MAX6971 supply and the LEDs’ supply or supplies can power up in any order. The constant-current outputs are programmed together to up to 55mA using a single external resistor. The MAX6971 operates with a 25Mb, industry-standard, 4-wire serial interface. The MAX6971 uses the industry-standard, shift-register-plus-latch-type serial interface. The driver accepts data shifted into a 16-bit shift register using data input DIN and clock input CLK. Input data appears at the DOUT output 16 clock cycles later to allow cascading of multi- ple MAX6971s. The latch-enable input, LE, loads the 16 bits of shift register data into a 16-bit output latch to set which LEDs are on and which are off. The output- enable, OE, gates all 16 outputs on and off, and is fast enough to be used as a PWM input for LED intensity control. For applications requiring LED fault detection, refer to the MAX6983, which automatically detects open-circuit LEDs. For safety-related applications requiring a watchdog timer, refer to the MAX6983, which includes a fail-safe feature that blanks the display if the serial interface becomes inactive for more than 1s. The MAX6971 is one of a family of 12 shift-register-plus- latch-type LED drivers. The family includes 8-port and 16-port types, with 5.5V- or 36V-rated LED outputs.

The MAX4541–MAX4544 are precision, dual analog switches designed to operate from a single +2.7V to +12V supply. Low power consumption (5µW) makes these parts ideal for battery-powered equipment. These switches offer low leakage currents (100pA max) and fast switching speeds (tON = 150ns max, tOFF = 100ns max). When powered from a +5V supply, the MAX4541– MAX4544 offer 2Ω max matching between channels, 60Ω max on-resistance (RON), and 6Ω max RON flatness. These switches also offer 5pC max charge injection and a minimum of 2000V ESD protection per Method 3015.7. The MAX4541/MAX4542/MAX4543 are dual single-pole/ single-throw (SPST) devices and the MAX4544 is a single- pole/double-throw (SPDT) device. The MAX4541 has two normally open (NO) switches and the MAX4542 has two normally closed (NC) switches. The MAX4543 has one NO and one NC switch and can be used as an SPDT, while the MAX4544 is an SPDT. The MAX4541/MAX4542/MAX4543 are available in tiny SOT23-8 and 8-pin TDFN packages, and the MAX4544 is available in a SOT23-6 package.

MAX6954 is a low-power 4-wire serial 7-segment, 14-segment, 16-segment LED display driver chip launched by MAXIM, supporting SPI / QSPI protocol, which can drive single 8-bit, 16-bit, 16-bit 7-segment, 128 discrete LEDs, and work with a supply voltage range of 2.7V-5.5V.

DS2788 is a battery management chip produced by ON Semiconductor. It supports the measurement of voltage, temperature, and current of lithium batteries, and estimates the available capacity. The chip stores battery characteristic parameters in on-chip EEPROM. According to these parameters, the remaining capacity of the battery can be calculated in mAh. The chip also supports LED display of battery capacity, which only requires a resistor to set the current in the LED display, thus reducing cost and space.

The MAX3815 cable equalizer automatically provides compensation for DVI™, HDMI™, DFP, PanelLink®, and ADC cables. It extends the usable cable distance up to 36 meters. The MAX3815 is designed to equalize signals encoded in the transition-minimized differential signaling (TMDS®) format. The MAX3815 features four CML-differential inputs and outputs (three data and one clock). It provides a loss-of-signal (LOS) output that indicates loss-of-clock signal. The outputs include a disable function or the equalizer can be powered down to conserve power. For direct chip-to-chip communication, the output drivers can be switched to one-half the DVI output specification to conserve power and reduce EMI. Equalization can be automatic or set to manual control for specific in-cable applications. The MAX3815 is available in a 7mm x 7mm, 48-pin TQFP-EP package and operates over a 0°C to +70°C temperature range.

The MAX9709 is a stereo/mono Class D audio power amplifier that provides up to 2 x 25W output power in 8Ω stereo mode and up to 1 x 50W output power in 4Ω mono mode. The product offers high efficiency of up to 87% and combines Class AB amplifier performance with the efficiency advantages of Class D, eliminating the need for a bulky heatsink and conserving power. The MAX9709 operates from a single +10V to +22V supply and drives the load in a BTL configuration. It offers two modulation schemes: fixed-frequency modulation (FFM) mode and spread-spectrum modulation (SSM) mode, which reduces EMI-radiated emissions. The MAX9709 can be synchronized to an external clock from 600kHz to 1.2MHz, and synchronized output allows multiple units to be cascaded in the system. Features include fully differential inputs, comprehensive click-and-pop suppression, and four selectable-gain settings (22dB, 25dB, 29.5dB, and 36dB). A pin-programmable thermal flag provides seven different thermal warning thresholds. Short-circuit and thermal-overload protection prevent the device from being damaged during a fault condition. The MAX9709 is available in 56-pin TQFN (8mm x 8mm x 0.8mm) and 64-pin TQFP (10mm x 10mm x 1.4mm) packages, and is specified over the extended -40°C to +85°C temperature range.

The MAX8631X/Y charge pump drives up to eight white LEDs with regulated constant current for uniform intensity. The main group of LEDs (M1-M4) can be driven up to 30mA per LED for backlighting. The flash group of LEDs (F1-F4) is independently controlled and can be driven up to 100mA per LED (or 400mA total). Two 200mA LDOs are on-board to provide power for camera functions. The LDOs’ output voltages are pin-programmable to meet different camera-module requirements. By utilizing adaptive 1x/1.5x/2x charge-pump modes and very-low-dropout current regulators, the MAX8631X/Y achieves high efficiency over the full 1-cell lithium-battery voltage range. The 1MHz fixed-frequency switching allows for tiny external components, and the regulation scheme is optimized to ensure low EMI and low input ripple.