Version 4 SHEET 1 2084 1060 WIRE -160 -288 -400 -288 WIRE 16 -288 -160 -288 WIRE 288 -288 16 -288 WIRE 448 -288 288 -288 WIRE 688 -288 448 -288 WIRE 832 -288 688 -288 WIRE 1088 -288 832 -288 WIRE 1232 -288 1088 -288 WIRE 1312 -288 1232 -288 WIRE 288 -256 288 -288 WIRE 448 -256 448 -288 WIRE 1088 -256 1088 -288 WIRE 1232 -256 1232 -288 WIRE -400 -240 -400 -288 WIRE 688 -192 688 -288 WIRE 832 -192 832 -288 WIRE 448 -144 448 -176 WIRE 624 -144 448 -144 WIRE 768 -144 752 -144 WIRE 1088 -144 1088 -176 WIRE 1232 -144 1232 -192 WIRE 1232 -144 1088 -144 WIRE 1328 -144 1232 -144 WIRE -400 -112 -400 -160 WIRE -304 -112 -400 -112 WIRE 160 -112 -240 -112 WIRE 176 -112 160 -112 WIRE 288 -112 288 -176 WIRE 288 -112 256 -112 WIRE 416 -112 288 -112 WIRE 1088 -112 1088 -144 WIRE 288 -96 288 -112 WIRE 1232 -96 1232 -144 WIRE 832 -64 832 -96 WIRE 880 -64 832 -64 WIRE -400 -48 -400 -112 WIRE 688 -48 688 -96 WIRE 752 -48 752 -144 WIRE 752 -48 688 -48 WIRE 832 -48 832 -64 WIRE 880 -32 880 -64 WIRE 1088 -16 1088 -32 WIRE 1152 -16 1088 -16 WIRE 1088 0 1088 -16 WIRE 288 16 288 -16 WIRE 448 16 448 -80 WIRE 448 16 288 16 WIRE 16 64 16 -288 WIRE 288 64 288 16 WIRE -400 80 -400 16 WIRE 832 80 832 32 WIRE 880 80 880 32 WIRE 880 80 832 80 WIRE 1040 80 880 80 WIRE 832 128 832 80 WIRE 880 128 832 128 WIRE 1088 128 1088 96 WIRE 1088 128 976 128 WIRE -160 144 -160 -288 WIRE 288 208 288 144 WIRE 448 208 288 208 WIRE 688 208 688 -48 WIRE 928 208 928 192 WIRE 928 208 688 208 WIRE 976 208 928 208 WIRE 1088 208 1088 128 WIRE 1088 208 1056 208 WIRE 16 256 16 144 WIRE 288 256 288 208 WIRE 448 256 448 208 WIRE 1088 256 1088 208 WIRE 832 272 832 128 WIRE 1040 272 832 272 WIRE -160 368 -160 224 WIRE 16 368 16 320 WIRE 16 368 -160 368 WIRE 288 368 288 320 WIRE 288 368 16 368 WIRE 448 368 448 336 WIRE 448 368 288 368 WIRE 1088 368 1088 352 WIRE 1088 368 448 368 WIRE 1312 368 1088 368 WIRE 160 480 160 -112 WIRE 624 480 160 480 WIRE 832 480 832 272 WIRE 832 480 624 480 FLAG 1232 -96 0 FLAG 624 480 pwr_good FLAG 1312 -288 common_plus FLAG 1328 -144 amp_gnd FLAG -400 80 0 FLAG 1152 -16 drain FLAG 1312 368 battery_minus SYMBOL ZR431L 432 -144 R0 SYMATTR InstName U1 SYMBOL voltage -160 128 R0 WINDOW 3 -243 121 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 -246 58 Left 0 SYMATTR Value PULSE(10 14 0 100m 100m 0 0 1) SYMATTR InstName Dummy_Battery SYMBOL res 1072 192 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R6 SYMATTR Value 100k SYMBOL nmos 1040 0 R0 SYMATTR InstName M1 SYMATTR Value NTLMS4504N SYMBOL pnp 624 -96 M180 WINDOW 0 30 56 Left 0 WINDOW 3 -32 -16 Left 0 SYMATTR InstName Q3 SYMATTR Value BC807-25 SYMBOL res 272 -272 R0 SYMATTR InstName R10 SYMATTR Value 140k SYMBOL res 272 -112 R0 SYMATTR InstName R11 SYMATTR Value 20k SYMBOL res 272 48 R0 SYMATTR InstName R12 SYMATTR Value 2k2 SYMBOL LED 272 256 R0 SYMATTR InstName D2 SYMATTR Value AOT-2015 SYMATTR Description Diode SYMATTR Type diode SYMBOL LED 0 256 R0 SYMATTR InstName D1 SYMATTR Value AOT-2015 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 0 48 R0 SYMATTR InstName R1 SYMATTR Value 220k SYMBOL res 432 240 R0 SYMATTR InstName R2 SYMATTR Value 4k7 SYMBOL res 432 -272 R0 SYMATTR InstName R3 SYMATTR Value 4k7 SYMBOL res 160 -96 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R4 SYMATTR Value 1meg SYMBOL res 1104 -160 R180 WINDOW 0 36 76 Left 0 WINDOW 3 36 40 Left 0 SYMATTR InstName amp SYMATTR Value 100R SYMBOL pnp 976 192 M270 WINDOW 0 10 59 Left 0 WINDOW 3 85 77 VLeft 0 SYMATTR InstName Q1 SYMATTR Value BC807-25 SYMBOL npn 768 -192 R0 SYMATTR InstName Q2 SYMATTR Value BC817-25 SYMBOL cap 1216 -256 R0 SYMATTR InstName C1 SYMATTR Value 1000µ SYMBOL res 1072 -128 R0 SYMATTR InstName polyswitch SYMATTR Value 100m SYMBOL voltage -400 -256 R0 WINDOW 3 4 -64 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 34 58 Left 0 SYMATTR Value PULSE(0 16.5 0 1u 1u 999u 2000u) SYMATTR InstName Dummy_Charger SYMBOL schottky -384 16 R180 WINDOW 0 24 72 Left 0 WINDOW 3 24 0 Left 0 SYMATTR InstName D3 SYMATTR Value B520C SYMATTR Description Diode SYMATTR Type diode SYMBOL diode -240 -128 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName D4 SYMATTR Value 1N4148 SYMBOL res 848 48 R180 WINDOW 0 36 76 Left 0 WINDOW 3 36 40 Left 0 SYMATTR InstName R7 SYMATTR Value 4k7 SYMBOL nmos 1040 352 M180 SYMATTR InstName M2 SYMATTR Value NTLMS4504N SYMBOL cap 864 -32 R0 SYMATTR InstName C2 SYMATTR Value 1n0 TEXT -400 312 Left 0 !.tran 0 200m 0 TEXT 0 952 Left 0 ;AC-circuit breaker fast turn-on for short inrush power peaks: 500ns Miller-plateau TEXT 1136 184 Left 0 ;AC-circuit breaker TEXT 0 872 Left 0 ;AC-circuit-breaker disconnects battery in case of 1) under voltage 2) charging TEXT 0 912 Left 0 ;AC-circuit breaker blocks bi-directional with lowest conduction loss TEXT 0 1040 Left 0 ;Full charger voltage powers the amp at higher power level than with battery. TEXT 0 544 Left 0 ;This worstcase setup simulates battery voltage ramping from 10-15V, simultaneously a 16.5V charger is connected/disconnected at 500Hz rate. TEXT 0 992 Left 0 ;Cold resistance of resettable PTC fuse reduces inrush power dissation in both NMOS within save area. TEXT 0 832 Left 0 ;Battery Under voltage lockout detector (U1,Q3,Q2,Q1) with hystersis (R4) TEXT 384 -320 Left 0 ;Battery-UVLO TEXT 0 784 Left 0 ;Duo LED (D1,D2) signalling battery state: from weak red to intense green. TEXT 0 728 Left 0 ;features: