Added STSPIN230 motor driver

**Datasheet**
  http://www.st.com/content/ccc/resource/technical/document/datasheet/group3/f5/79/9b/db/49/dd/4d/36/DM00293530/files/DM00293530.pdf/jcr:content/translations/en.DM00293530.pdf

library/motor_drivers.dcm

@@ -66,4 +66,10 @@ K Stepper driver
 F http://www.onsemi.com/pub_link/Collateral/EN6507-D.PDF
 $ENDCMP
 #
+$CMP STSPIN230
+D Low voltage triple half-bridge motor driver, 1.8V to 10V input, 1.3Arms output, 0.4Ω Rdson per phase (typical), QFN-16 package
+K motor driver half-bridge
+F http://www.st.com/content/ccc/resource/technical/document/datasheet/group3/f5/79/9b/db/49/dd/4d/36/DM00293530/files/DM00293530.pdf/jcr:content/translations/en.DM00293530.pdf
+$ENDCMP
+#
 #End Doc Library

library/motor_drivers.lib

@@ -330,4 +330,36 @@ X ENABLE 15 -500 -200 100 R 50 50 1 1 I
 ENDDRAW
 ENDDEF
 #
+# STSPIN230
+#
+DEF STSPIN230 U 0 40 Y Y 1 F N
+F0 "U" -400 650 50 H V C CNN
+F1 "STSPIN230" 200 650 50 H V L CNN
+F2 "Housings_DFN_QFN:QFN-16-1EP_3x3mm_Pitch0.5mm" 200 750 50 H I L CNN
+F3 "" 150 250 50 H V C CNN
+$FPLIST
+ QFN*3x3mm*Pitch0.5mm*
+$ENDFPLIST
+DRAW
+S -400 600 500 -600 0 1 10 f
+X INUH 1 -500 500 100 R 50 50 1 1 I
+X INUL 2 -500 400 100 R 50 50 1 1 I
+X OUTU 3 600 500 100 L 50 50 1 1 w
+X SENSE 4 600 -300 100 L 50 50 1 1 I
+X NC 5 200 -700 100 U 50 50 1 1 N N
+X VS 6 0 700 100 D 50 50 1 1 W
+X GND 7 0 -700 100 U 50 50 1 1 W
+X OUTV 8 600 200 100 L 50 50 1 1 O
+X SENSE 9 600 -400 100 L 50 50 1 1 I
+X OUTW 10 600 -100 100 L 50 50 1 1 O
+X INWL 11 -500 -200 100 R 50 50 1 1 I
+X INWH 12 -500 -100 100 R 50 50 1 1 I
+X EN/FLT 13 -500 -400 100 R 50 50 1 1 B
+X STBY 14 -500 -500 100 R 50 50 1 1 I
+X INVL 15 -500 100 100 R 50 50 1 1 I
+X INVH 16 -500 200 100 R 50 50 1 1 I
+X PAD 17 100 -700 100 U 50 50 1 1 W
+ENDDRAW
+ENDDEF
+#
 #End Library