UCN5829EB

Data Sheet 26185.50 5829 V DD GND REFERENCE 41 RCV 40 SERIAL DATA IN 42 STROBE 44 CLOCK 43 IN SERIAL DATA OUT 1 9 SUPPLY 4 2 RC C RC EN 5 3 HIGH-SIDE DRIVER 6 9-BIT SERIAL-INPUT, LATCHED SINK DRIVER CLK T C U Y D L O N R P EO D C E N U E N R I T E F N E O R C S R I D FO — CURRENT CONTROL 7 8 39 GND 38 ONE-SHOT 9 The 9-bit CMOS shift register and latches allow operation with most microprocessor/LSI-based systems. With a 5 V logic supply, these BiMOS devices will operate at data input rates greater than 3.3 MHz. The CMOS inputs cause minimum loading and are compatible with standard CMOS, PMOS, NMOS, and TTL circuits. A CMOS serial data output allows cascade connections in applications requiring additional drive lines as required for 24-wire printheads. 37 36 10 11 35 SHIFT REGISTER 12 34 13 33 14 32 LATCHES 15 31 30 16 GND Intended primarily to drive high-current, dot matrix 9- and 24-wire printer solenoids, the UCN5829EB serial-input, latched sink driver provides a complete driver function with a minimum external parts count. Included on chip are constant-frequency PWM current control for each output driver, a user-defined output enable timeout, current sensing, and thermal shutdown. 17 29 GND 26 27 28 OUT 2 OUT 1 NO CONNECTION 23 OUT 5 25 22 OUT 6 24 21 OUT 7 OUT 4 20 OUT 8 OUT 3 19 NC OUT 9 NO CONNECTION 18 NC Dwg. PP-028A ABSOLUTE MAXIMUM RATINGS Output Current Voltage, VOUT ............ 50 V Output Current, IOUT(S) (Continuous) ................................ 1.6 A (Peak) ............................................ 1.8 A Logic Supply Voltage, VDD .................. 7.0 V Input Voltage Range, VIN ....................... -0.3 V to VDD + 0.3 V Package Power Dissipation, PD ........................................ See Graph Operating Temperature Range, TA .................................. -20°C to +85°C Junction Temperature, TJ ............... +150°C* Storage Temperature Range, TS ............................... -55°C to +150°C * Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated, but should be avoided. The device features nine open-collector Darlington drivers, each rated at 50 V and 1.6 A. Current-control for each output is provided by an internal current-sensing resistor and a constant-frequency chopper circuit. An external high-side driver can be used to optimize print head performance. It is enabled by an on-chip driver during the output enable timeout. Internal logic sequencing prevents false output operation during power up. Other high-current devices for driving dot matrix printheads are the UDN2961B/W and UDN2962W. The UCN5829EB is supplied in a 44-lead power PLCC. Its batwing construction provides for maximum package power dissipation in a minimum-area, surface-mountable package. FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 1.6 A Continuous Output Current 50 V Minimum Sustaining Voltage Internal Current Sensing Constant-Frequency PWM Current Control Control for External High-Side Driver To 3.3 MHz Data Input Rate Low-Power CMOS Logic & Latches Internal Pull-Ups for TTL Compatibility User-Defined Output Enable Timeout Internal Thermal Shutdown Circuitry Caution: This CMOS device has input static protection but is susceptible to damage when exposed to extremely high static electrical charges. Always order by complete part number: UCN5829EB . 5829 9-BIT SERIAL-INPUT, LATCHED SINK DRIVER FUNCTIONAL BLOCK DIAGRAM +5 V HIGH-SIDE DRIVER 6 3 +5 V RC 5 CC VDD REN 4 ÷2 ONE-SHOT C EN P.O.R. CHOP INHIBIT 40 V REF CURRENT LEVEL CONTROL 41 R CV = STROBE 42 5 kΩ 1 IN 9 2 7-17 S Q TO DRIVERS 4, 6, 8 SERIAL DATA OUT 26 OUT2 R + – DRIVER TWO OF NINE DRIVERS 29-39