L634 Datasheet | STMicroelectronics

DESCRIPTION The L6234 is a triple half bridge to drive a brushless motor. It is realized in Multipower BCD technology which bines isolated DMOS power transistors with CMOS and Bipolar circuits on the same chip. By using mixed technology it has been possible to optimize the logic circuitry and the power stage to achieve the best possible performance. The output DMOS transistors can sustain a very high current due to the fact that the DMOS structure is not affected by the second breakdown ef PIN CONNECTION (Top view) POWER DIP (16+2+2) Power SO20 ORDERING NUMBERS: L6234 (POWER DIP 16+2+2) L6234PD (Power SO20) fect, the RMS maximum current is practically limited by the dissipation capability of the package. All the logic inputs are TTL, CMOS and µP patible. Each channel is controlled by two separate logic input. L6234 is available in 20 pin POWER DIP package (16+2+2) and in Power SO20. OUT1 IN1 EN1 VS GND GND VS EN3 IN3 OUT3 1 2 3 4 5 6 7 8 9 10 D98IN848 20 19 18 17 16 15 14 13 12 11 OUT2 IN2 EN2 SENSE1 GND GND SENSE2 VBOOT VCP VREF GND SENSE1 EN2 IN2 OUT2 OUT1 IN1 EN1 VS GND 1 2 3 4 5 6 7 8 9 10 D94IN129A 20 19 18 17 16 15 14 13 12 11 GND SENSE2 VBOOT Vcp VREF OUT3 IN3 EN3 VS GND POWER DIP (16+2+2) Power SO20 August 2003 1/10 L6234 BLOCK DIAGRAM 0.22µF 10n F VCP CHARGE PUMP IN1 1µF VREF VBOOT VREF= 10V Vs 7 to 52V TH1 OUT1 EN1 TL1 0.1 µF 100µF 1N4148 IN2 TH2 OUT2 EN2 THERMAL PROTECTION IN3 TL2 SENSE1 TH3 OUT3 EN3 TL3 SENSE2 D95IN309A RSENSE 2/10 L6234 THERMAL DATA Symbol Rth j-pin Rth j-amb1 Rth j-amb2 Rth j-case Parameter Thermal Resistance, Junction to Pin Thermal Resistance, Junction to Ambient (see Thermal Characteristics) Thermal Resistance, Junction to Ambient (see Thermal Characteristics) Thermal Resistance Junction-case DIP16+2+2 12 40 50 - Power SO20 - - - 1.5 Unit °C/W °C/W °C/W °C/W THERMAL CHARACTERISTICS Rth j-pins DIP16+2+2. The thermal resistance is referred to the thermal path from the dissipating region on the top surface...