NJW4124 IC ( ) NJW4124 AC-DC 1cell/2cell IC / 1 NJW4124M / Bi-CMOS NJW4124M : DMP20 P-CHG 1 20 Q-CHG NFB 2 19 CS1 TX-SW 3 18 CS2 GND 4 17 VS PC 5 16 V

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1 IC ( ) AC-DC 1cell/2cell IC / 1 M / Bi-CMOS M : DMP20 P-CHG 1 20 Q-CHG NFB 2 19 CS1 TX-SW 3 18 CS2 GND 4 17 VS PC 5 16 VREF ADP 6 15 V TDET 8 13 TH C TL C CHG-SW M - 1 -

2 (Ta=25 C) V V C1 V C1 +5 V C2 V C2 +5 V TDET V TDET +5 V TX-SW I SINK-SW 50 ma PC I SINK-PC 50 ma P D DMP20 :300 mw T opr C T stg C (V + =5V, Ta=25 ) V OP V I CC CHG-SW: OPEN 2 3 ma V T V V T V V HYS mv V REF I REF =0mA V V REF I REF =0mA 1mA 10 mv V Q-CHG VS: L H V R-CHG VS: H L V BAT x 0.71 V BAT x 0.94 V BAT V BAT x 0.73 V BAT x 0.95 V BAT x 0.75 V BAT x 0.96 V OV VS: L H x x x V V REF-CV VS V V REF-ADP V VS I VS VS=2.1V na V T-TDET TDET V 2mA I CHG1 VS=1V ma V V LV VS: L H BAT V BAT V BAT V x x x V BAT V BAT V V - 2 -

3 (V + =5V, Ta=25 ) A V1 CS1=3.8V, CS2=3.6V db V F CS2=4.2V, VS=2.1V mv CS1 I CS1 CS1=4.2V na CS2 I CS2 CS2=4.2V na V OL-PC I SINK=20mA V PC I LEAK-PC V + =14V 1 µa TX-SW TX-SW V OL-SW I SINK=20mA V TX-SW I LEAK-SW V + =14V 1 µa LED V V V V OSC1 T1 C1=C2=0.01µF % OSC2 T % CHG-SW V SW V V SW- 1 V R PULL-UP kω - 3 -

4 V REF R A1 PC R P1 R Q1 R A2 R P2 R Q2 V + PC ADP NFB P-CHG Q-CHG VREF1 12dB TX-SW CS1 Rcs V REF VREF V CS2 VREF V VREF2 VS R B1 R B2 GND C1 C2 OSC 1 OSC 2 CS1 CLK Quick/ Pre-Charge Charge / 2mA Charge Start/Stop Time Out Start/Stop Time Out Battery Voltage Detection Temp. Detection 6dB VBAT x 0.73 VBAT x 0.95 VBAT x VBAT x R B1 = R B2 R B1 = 3 R B2 TDET TH V REF VREF1 Charge - V + TL RPULL-UP V + Lithium Ion Battery VREF1 GND CHG-SW - 4 -

5 1 P-CHG 2 NFB 3 TX-SW 4 GND 5 PC 6 ADP 7 LED 8 LED 9 C1 2mA LED 10 C2 11 CHG-SW / 12 TL 13 TH 14 TDET 15 V + 16 VREF 17 VS 18 CS CS Q-CHG / R A1 + RA2 V ADP = x V REF-ADP (1.24V) RA R B1 + RB2 V BAT = x V REF-CV (2.1V) RB2 4.2V 8.4V V BAT x V 4.41V V BAT x V 6.13 V V BAT x V 7.98 V V BAT x V 8.61 V RP2 I P-CHG = ( x V REF (1.24V) / 4) / R CS RP1 + RP2 100mA (at. R P1 :232kΩ, R P2 :16kΩ, R CS =0.2Ω) RQ2 I Q-CHG = ( x V REF (1.24V) / 4) / R CS RQ1 + RQ2 750mA (at. R Q1 :128kΩ, R Q2 :120kΩ, R CS =0.2Ω) I F-CHG = (96mV / 8) / R CS (at. R CS =0.2Ω) 60mA - 5 -

6 V REF-CV (V) (V + =5V, VS) Ta ( o C) V REF-ADP (V) (V + =5V) Ta ( o C) V REF (V) (V + =5V, I =0mA) REF Ta ( o C) A V1 (db) (V + =5V, CS1=3.8V, CS2=3.6V) Ta ( o C) 0.8 CHG-SW V + =5V) 3 (V + =5V, CHG-SW:OPEN) (V) V SW_ V SW_ Ta ( o C) I CC (ma) Ta ( o C) - 6 -

7 TX-SW,PC (V + =5V, Ta=25 o C) (V) TX-SW PC I (ma) SINK OSC1, OSC2 (ms) (V + =5V, Ta=25 o C) C1, C2 (µf) OSC1, OSC2 (ms) (V + =5V, C1=C2=0.01µF) Ta ( o C) - 7 -

8 (PC CHG-SW TX-SW ) AC/DC 1 AC/DC AC/DC 1 / CHG-SW TDET CHG-SW TDET 2mA ADP OR AC/DC 1 R A1 PC R A2 PC ADP NFB TX-SW SW ADP V REF1 (1.24V) 12dB L H P-CHG Q-CHG VS V REF2 (2.1V) 1 SW - 8 -

9 TX-SW SW (ADP ) ADP SW ADP R A1 R A2 R A1 + RA2 V ADP = x V REF-ADP (1.24V) RA2 TX-SW SW SW ADP SW 2mA SW SW - 9 -

10 VS VS VS V BAT VS R B1 R B2 R B1 + R V BAT = RB2 B2 x V REF-CV (2.1V) OR R B1 R B1 =R B2 R B1 =3 R B2 VS Battery Voltage Detection VREF2 VBAT x 0.73 VBAT x 0.95 VBAT x VS R B2 RB1 = RB2 RB1 = 3 RB2 VS VS V OV =V BAT (typ.) VBAT x UVLOCHG-SW 2mA VS CS1 2mA 2mA V LV =V BAT (typ.) 2mA 12dB CS1 Rcs 2mA CS1 2mA 2mAUVLO CHG-SW VBAT x mA CS2 VS R B1 R B2 VS V R-CHG =V BAT 0.95 (typ.)

11 CS1 CS2 R CS CS1 CS2 CS1 CS2 12dB P-CHG Q-CHG VS V BAT V BAT V BAT 0.73 V BAT 0.73 V BAT P-CHG Q-CHG V REF R PC P1 R Q1 I P-CHG = ( R I Q-CHG = ( R RP2 P1 + RP2 RQ2 Q1 + RQ2 x V REF (1.24V) / 4) / R CS x V REF (1.24V) / 4) / R CS OR NFB P-CHG R P2 R Q2 Q-CHG 12dB CS1 Rcs F-CHG I F-CHG I F-CHG = (96mV / 8) / R CS Quick/ Pre-Charge / 6dB VBAT x 0.73 CS2 VS F-CHG R B1 R B2 R F1 R F2 V REF

12 TDET TH TL TL TH R THL, R TH, R TL NTC TDET TL TH V TL < V DET < V TH V REF TDET RT V TDET = V R + R TDET T REF(1.24V) Temp. Detection TDET TH R THL R TDET TH RTH + RTL V TH = V R + R + R THL TH TL REF(1.24V) Charge - TL R TH R TL R T TL RTL V TL = V R + R + R THL TH TL REF(1.24V) CHG-SW V T-TDET =1.15V UVLO Lithium Ion Battery TDET TDET 1.15V(typ.)

13 CHG-SW C1 C2 OSC1 2mA OSC2 C1, C2 t (C1, C2) (OSC1, OSC2) 4700pF t = 4.7ms 0.01µF t = 10ms 0.022µF t = 22ms 0.047µF t = 47ms 2mA t s t min. LED R t s C1=0.01µF t s t s t hours 55 min. C2=0.01µF OSC

14 UVLO CHG-SW 1/150,000 TH TL C1 C2 200kHz 300kHz 250kHz 4µs (t = 4µs) 2mA t ms t s LED R t ms t ms t µs t s TDET 1.2V / TDET TDET 0.3V 0.4V 1.1V (t = 4µs) t 2 8, t 2 8 1ms, 1ms t 2 9, t ms, 4ms

15 VREF 1.24V 2.1V VREF 1.24V IC VREF IC (UVLO)V + GND IC 200mV IC V + LED LED LED 1.24V LED LED LED LED I (1.24V-V BE ) / R LED I LED R LED V REF1 (1.24V) LED I (1.24V-V BE ) / R LED

16 V + >2.3V CHG-SW =GND : : TX-SW: V TL <V TDET <V TH V BAT <V OV V TDET <1.15V V BAT >V Q-CHG : : TX-SW: : : TX-SW: : : 2mA : I BAT <I F-CHG : : TX-SW: V BAT <V R-CHG V BAT > V LV 2mA : TX-SW: : : TX-SW: V BAT >V Q-CHG CHG-SW

17 TX-SW CHG-SW IC 22min* 60mA* 3h* TX-SW TX-SW CHG-SW CHG-SW / 1.28s* / C1=0.01µF C2=0.01µF

18 2mA 2mA 10s* 2mA 2mA 10s* TX-SW TX-SW CHG-SW CHG-SW / 1.28s* C1=0.01µF C1=0.01µF TX-SW TX-SW CHG-SW CHG-SW / 1.28s* / 1.28s* C1=0.01µF C1=0.01µF

19 2mA SW-Tr. Q-CHG P-CHG 2mA CHG-SW

20 MEMO

NJW4108 IC ( ) NJW4108 1cell/2cell IC NJW4108V / Bi-CMOS NJW4108V : SSOP20 P-CHG 1 20 Q-CHG NFB 2 19 CS1 CNT 3 18 CS2 GND 4 17 VS NC 5 16 VREF F-CHG 6

NJW4108 IC ( ) NJW4108 1cell/2cell IC NJW4108V / Bi-CMOS NJW4108V : SSOP20 P-CHG 1 20 Q-CHG NFB 2 19 CS1 CNT 3 18 CS2 GND 4 17 VS NC 5 16 VREF F-CHG 6 IC ( ) 1cell/2cell IC V / Bi-CMOS V : SSOP20 P-CHG 1 20 Q-CHG NFB 2 19 CS1 CNT 3 18 CS2 GND 4 17 VS NC 5 16 VREF F-CHG 6 15 V + 7 14 TDET 8 13 TH C1 9 12 TL C2 10 11 V - 1 - (Ta=25 C) V + +15 V C1 V C1