add NS4150b audio amp

ic/audioamp_ns4150b.yaml

@@ -0,0 +1,41 @@
+name: NS4150B
+description: amplifier, audio, class D, mono, 3W
+datasheet: http://www.nsiway.com.cn/product/58.html 
+distributor: LCSC C189961
+
+pinout:
+  CTRL: 1
+  BYPASS: 2
+  IN:
+    INP: 3
+    INN: 4
+  OUT:
+    VOP: 8
+    VON: 5
+  GND: 7
+  VCC: 6
+
+properties:
+  in: IN, CTRL
+  out: OUT
+  passive: BYPASS
+  power: VCC
+  ground: GND
+
+schematic:
+  symbol: IC
+  left: IN, CTRL, BYPASS
+  right: OUT
+  top: VCC
+  bottom: GND
+
+housing:
+  pattern: SOP # MSOP-8
+  bodyWidth: 2.9-3.1 # E1
+  bodyLength: 2.9-3.1 # D
+  height: 1.1 # A
+  pitch: 0.65 # e
+  leadCount: 8
+  leadLength: 0.4-0.7 # L
+  leadSpan: 4.7-5.1 # E
+  leadWidth: 0.29-0.38 # b