Datasheet LTC4123 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Low Power Wireless Charger for Hearing Aids |
| Pages / Page | 18 / 5 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 1.1 Mb |
| Document Language | English |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. VCC High and Low Thresholds. CHRG Pull-Down Current
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LTC4123
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. VCC High and Low Thresholds CHRG Pull-Down Current vs Temperature vs Temperature
5.00 380 4.50 360 4.00 340 TAGE (V) (µA) Y VOL 3.50 I CHRG 320 SUPPL 3.00 300 VCC(HIGH) VCC(LOW) 2.50 280 –20 –5 10 25 40 55 70 85 –20 –5 10 25 40 55 70 85 TEMPERATURE (°C) TEMPERATURE (°C) 4123 G10 4123 G11
Charge Termination Period Charge Timer Accuracy vs Temperature vs Supply Voltage
7.20 20.0 15.0 6.60 10.0 5.0 6.00 (Hours) 0 T CHG –5.0 5.40 –10.0 CHARGE TIMER ACCURACY (%) –15.0 4.80 –20.0 –5 10 25 40 55 70 2.2 2.9 3.6 4.3 5.0 TEMPERATURE (°C) SUPPLY VOLTAGE (V) 4123 G12 4123 G13
Maximum Available Wireless Power vs Coil Spacing Typical Wireless Charging Cycle
125 30 MAXIMUM CHARGE CURRENT A 260 1.6 MAX POWER MAX CHARGE CURRENT VBAT 100 24 195 1.2 75 18 V) VB (m A 130 0.8 T (V) VAILABLE POWER (mW) 50 R PROG PROG(MIN) = 953Ω 12 V V See Figure 4 LRX = 760308101208 AILABLE (mA) V P675 NiMH PROG 65 0.4 L 25 R =976Ω TX = 760308103206 6 PROG fDRIVE =244kHz MAXIMUM A fDRIVE = 244kHz T L X =760308103206 See Figure 4 R L X =760308101208 0 0 0 0.0 1.5 3.5 5.5 7.5 9.5 11.5 0 1 2 3 4 5 6 COIL SPACING (mm) TIME (HOURS) 4123 G14 4123 G15 4123fa For more information www.linear.com/LTC4123 5
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. VCC High and Low Thresholds CHRG Pull-Down Current vs Temperature vs Temperature
5.00 380 4.50 360 4.00 340 TAGE (V) (µA) Y VOL 3.50 I CHRG 320 SUPPL 3.00 300 VCC(HIGH) VCC(LOW) 2.50 280 –20 –5 10 25 40 55 70 85 –20 –5 10 25 40 55 70 85 TEMPERATURE (°C) TEMPERATURE (°C) 4123 G10 4123 G11
Charge Termination Period Charge Timer Accuracy vs Temperature vs Supply Voltage
7.20 20.0 15.0 6.60 10.0 5.0 6.00 (Hours) 0 T CHG –5.0 5.40 –10.0 CHARGE TIMER ACCURACY (%) –15.0 4.80 –20.0 –5 10 25 40 55 70 2.2 2.9 3.6 4.3 5.0 TEMPERATURE (°C) SUPPLY VOLTAGE (V) 4123 G12 4123 G13
Maximum Available Wireless Power vs Coil Spacing Typical Wireless Charging Cycle
125 30 MAXIMUM CHARGE CURRENT A 260 1.6 MAX POWER MAX CHARGE CURRENT VBAT 100 24 195 1.2 75 18 V) VB (m A 130 0.8 T (V) VAILABLE POWER (mW) 50 R PROG PROG(MIN) = 953Ω 12 V V See Figure 4 LRX = 760308101208 AILABLE (mA) V P675 NiMH PROG 65 0.4 L 25 R =976Ω TX = 760308103206 6 PROG fDRIVE =244kHz MAXIMUM A fDRIVE = 244kHz T L X =760308103206 See Figure 4 R L X =760308101208 0 0 0 0.0 1.5 3.5 5.5 7.5 9.5 11.5 0 1 2 3 4 5 6 COIL SPACING (mm) TIME (HOURS) 4123 G14 4123 G15 4123fa For more information www.linear.com/LTC4123 5
