EVAL6226QR Demonstration board mounting the L6226Q dual full-bridge driver Data brief Features ■ Operating supply voltage from 8 to 52 V ■ 2.8 A output peak current (1.4 A DC) ■ RDS(on) 0.73 Ω typ. value @ TJ = 25 °C ■ Operating frequency up to 100 kHz ■ Programmable high-side overcurrent detection and protection ■ Diagnostic output ■ Paralleled operation ■ Cross conduction protection ■ Thermal shutdown ■ Undervoltage lockout ■ Integrated fast free wheeling diodes Description The L6226Q is a DMOS dual full-bridge designed for motor control applications, realized in BCD multipower technology. The L6226Q features thermal shutdown and a non-dissipative overcurrent detection on the high-side power MOSFETs plus a diagnostic output that can be easily used to implement the overcurrent protection. January 2013 Doc ID 024141 Rev 1 For further information contact your local STMicroelectronics sales office. 1/8 www.st.com 8 Board description 1 EVAL6226QR Board description Table 1. EVAL6226QR electrical specifications (recommended values) Parameter Value Supply voltage range (VS) 8 to 52 Vdc Output current rating (OUTx) up to 1.4 Ar.m.s. Switching frequency up to 100 kHz Input and enable voltage range 0 to + 5 V OCD pin voltage range -0.3 to 10 V L6226Q thermal resistance junction-to-ambient 42°C/W Figure 1. EVAL6226QR demonstration board description ENA IN2A IN1A DIAGA PGND VS OUT1A OUT2A SGND OUT2B OUT1B ENB IN1B IN2B DIAGB AM16527v1 2/8 Doc ID 024141 Rev 1 EVAL6226QR Board description Table 2. EVAL6226QR pin connections Name Type VS Power supply PGND Ground Power ground terminal IN1A Logic input Bridge A logic input 1 IN2A Logic Input Bridge A logic input 2 ENA Logic input Bridge A enable (active high). When low, the power DMOSs of bridge A are switched OFF. IN1B Logic input Bridge B logic input 1 IN2B Logic input Bridge B logic input 2 ENB Logic input Bridge B enable (active high). When low, the power DMOSs of bridge B are switched OFF. Open drain output Bridge A overcurrent detection and thermal protection pin. An internal open drain transistor pulls to GND when overcurrent on bridge A is detected or in case of thermal protection. DIAGB Open drain output Bridge B overcurrent detection and thermal protection pin. An internal open drain transistor pulls to GND when overcurrent on bridge B is detected or in case of thermal protection. SGND Ground OUT1A Power output Bridge A output 1 OUT2A Power output Bridge A output 2 OUT1B Power output Bridge B output 1 OUT2B Power output Bridge B output 2 DIAGA Function Bridge A and bridge B power supply Signal ground terminal Doc ID 024141 Rev 1 3/8 4/8 Doc ID 024141 Rev 1 R3 C5 C6 BVS BSENSE AVS ASENSE PROGCLB 1 OCDA 15 PROGCLA 26 SGND R4 U1 IN 2B IN 1B ENB 20 DIAGB DIAGA 14 13 16 DNG IN2B IN1B R2 ENB L6226Q TVBOO ENA 17 R1 21 PVC ENA 24 IN 2A 3 25 IN 1A C3 1 22 28 D1 Bat46SW 2 7 8 10 18 32 9 19 31 23 2 3 4 5 6 L6226 VFQFPN5x5 NC NC NC NC NC OUT1B OUT2B OUT1A OUT2A NC NC NC NC NC C4 OUT1B OUT2B OUT1A OUT2A PGND VS Figure 2. IN2A IN1A 27 C2 C1 Board description EVAL6226QR EVAL6226QR schematic 12 29 R6 R5 OCDB 11 DNG 30 AM16528v1 EVAL6226QR Board description Table 3. EVAL6226QR part list Part reference Part value Part description C1 220 nF/25 V Capacitor C2 220 nF/63 V Capacitor C3 10 nF/25 V Capacitor C4 100 μF/63 V Capacitor C5, C6 5.6 nF Capacitor D1 BAT46SW Diodes R1, R2, R3, R4 100 kΩ 5% 0.25 W Resistor R5, R6 10 kΩ 1% 0.25 W Resistor R9, R10 0.4 kΩ 1 W Resistor U1 L6226Q Dual full-bridge in VFQFPN5x5 Figure 3. Component placement 24.5 mm 27 mm Doc ID 024141 Rev 1 AM16529v1 5/8 Board description Figure 4. EVAL6226QR Top layer layout AM16530v1 Figure 5. Bottom layer layout AM16531v1 6/8 Doc ID 024141 Rev 1 EVAL6226QR 2 Revision history Revision history Table 4. Document revision history Date Revision 11-Jan-2013 1 Changes Initial release. Doc ID 024141 Rev 1 7/8 EVAL6226QR Please Read Carefully: Information in this document is provided solely in connection with ST products. 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