EVAL6227QR

EVAL6227QR Demonstration board mounting the L6227Q 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 ■ Non dissipative overcurrent protection ■ Dual independent constant tOFF PWM current controllers ■ Slow decay synchronous rectification ■ Cross conduction protection ■ Thermal shutdown ■ Undervoltage lockout ■ Integrated fast free wheeling diodes Description The L6227Q is a DMOS dual full-bridge designed for motor control applications, realized in BCD multipower technology. The L6227Q features thermal shutdown and a non-dissipative overcurrent protection on the high-side power MOSFETs plus a diagnostic output that can be easily used to implement the overcurrent protection. The device also includes two independent constant off-time PWM current controllers which perform the chopping regulation. January 2013 Doc ID 024129 Rev 1 For further information contact your local STMicroelectronics sales office. 1/8 www.st.com 8 Board description 1 EVAL6227QR Board description Table 1. EVAL6227QR 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 Voltage reference range (REFA, REFB) 0 to + 5 V L6227Q thermal resistance junction-to-ambient 42 °C/W Figure 1. EVAL6227QR demonstration board description SGND IN1B IN2A IN2B REFA REFB IN1A DIAGB DIAGA ENB ENA PGND VS OUT1B OUT2B OUT2A OUT1A AM16539v1 2/8 Doc ID 024129 Rev 1 EVAL6227QR Board description Table 2. EVAL6227QR pin connections Name Type Function 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. DIAGA Open drain output Bridge A diagnostic pin. When low, an overcurrent or overtemperature event of bridge A is signaled. DIAGB Open drain output Bridge B diagnostic pin. When low, an overcurrent or overtemperature event of bridge B is signaled. SGND Ground REFA Analog input Bridge A current controller reference voltage REFB Analog input Bridge B current controller reference voltage 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 Bridge A and bridge B power supply Signal ground terminal Doc ID 024129 Rev 1 3/8 4/8 R3 R4 R7 Doc ID 024129 Rev 1 R13 RCA 30 C9 11 REFB C8 C7 C10 SENSEA R11 C6 RCB C5 R10 29 REFA R9 VREF B SENSEA 12 SGND R8 U1 SENSEB DIAGB DIAGA IN 2B IN 1B ENB VSA 14 13 VSB IN2B IN1B 16 GND R2 GND 1 ENB 21 L6227Q VBOOT ENA 17 VCP R1 24 ENA 3 IN 2A C3 1 22 25 IN 1A D1 20 28 27 2 7 8 10 18 32 9 19 31 23 2 3 4 5 6 SENSEB L6227Q 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 C2 C1 Board description EVAL6227QR EVAL6227QR demonstration board schematic R21 R20 R6 R5 15 VREF A 26 R1 2 R14 AM16540v1 EVAL6227QR Board description Table 3. EVAL6227QR 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 C7, C10 820 pF Capacitor C8, C9 220 nF Capacitor D1 BAT46SW Diode R1, R2, R3, R4, R7, R8, R9, R10 100 kΩ, 5%, 0.25 W Resistor R5, R6 100 kΩ, 1%, 0.25 W Resistor R11, R13 20 kΩ, 5 %, 0.25 W Resistor R12, R14 2 kΩ, 5 %, 0.25 W Resistor R20, R21 0.4 Ω, 1 W Resistor U1 L6227Q Dual full-bridge in VFQFPN5x5 Figure 3. Component placement 27 mm 32 mm Doc ID 024129 Rev 1 AM16541v1 5/8 Board description Figure 4. EVAL6227QR Top layer layout AM16542v1 Figure 5. Bottom layer layout AM16543v1 6/8 Doc ID 024129 Rev 1 EVAL6227QR 2 Revision history Revision history Table 4. Document revision history Date Revision 09-Jan-2013 1 Changes Initial release. Doc ID 024129 Rev 1 7/8 EVAL6227QR Please Read Carefully: Information in this document is provided solely in connection with ST products. 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