Datasheet LT1505 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Constant-Current/Voltage High Efficiency Battery Charger |
| Pages / Page | 16 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency of Figure 1 Circuit. … |
| File Format / Size | PDF / 170 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency of Figure 1 Circuit. VGBIAS vs IGBIAS. VREF Line Regulation
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LT1505
W U TYPICAL PERFORMANCE CHARACTERISTICS Efficiency of Figure 1 Circuit VGBIAS vs IGBIAS VREF Line Regulation
105 9.2 0.003 0°C VIN = 19V 0°C ≤ TJ ≤ 125°C V 9.1 BAT = 12.6V 25°C 0.002 100 9.0 125°C 8.9 0.001 ALL TEMPERATURES 95 8.8 (V) (V) 8.7 0 REF GBIAS ∆V 90 V 8.6 EFFICIENCY (%) –0.001 8.5 85 8.4 –0.002 8.3 80 8.1 –0.003 0 1 2 3 4 5 0 –2 –4 –6 –8 –10 –12 –14 –16 –18 –20 0 5 10 15 20 25 30 I V BAT (A) IGBIAS (mA) CC (V) 1505 G01 1505 G02 1505 G03
Current Limit Amplifier
∆
VFB vs IVA (Voltage Amplifier) CL1 Threshold ICC vs VCC
4 98 15 96 14 3 94 13 (mV) 2 (mA) FB∆V 125°C I CC 92 12 0°C THRESHOLD (mV) 1 25°C 90 11 25°C 125°C 0 88 10 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 25 50 75 100 125 10 13 16 19 22 25 I TEMPERATURE (°C) VA (mA) VCC (V) 1505 G04 1505 G05 1505 G06
PROG Pin Characteristics V Reference Voltage vs Temperature C Pin Characteristics
6 –1.2 2.470 CURRENT FEEDBACK AMPLIFIER OPEN LOOP –1.0 2.468 –0.8 –0.6 125°C 2.466 –0.4 (mA) –0.2 0 25°C 2.464 (mA) 0 I VC I PROG 0.2 2.462 0.4 REFERENCE VOLTAGE (V) 0.6 2.460 0.8 – 6 1.0 2.458 0 1 2 3 4 5 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 25 50 75 100 125 150 JUNCTION TEMPERATURE ( V V °C) PROG (V) C (V) 1505 G07 1505 G09 1505 G08 1505fc 5
W U TYPICAL PERFORMANCE CHARACTERISTICS Efficiency of Figure 1 Circuit VGBIAS vs IGBIAS VREF Line Regulation
105 9.2 0.003 0°C VIN = 19V 0°C ≤ TJ ≤ 125°C V 9.1 BAT = 12.6V 25°C 0.002 100 9.0 125°C 8.9 0.001 ALL TEMPERATURES 95 8.8 (V) (V) 8.7 0 REF GBIAS ∆V 90 V 8.6 EFFICIENCY (%) –0.001 8.5 85 8.4 –0.002 8.3 80 8.1 –0.003 0 1 2 3 4 5 0 –2 –4 –6 –8 –10 –12 –14 –16 –18 –20 0 5 10 15 20 25 30 I V BAT (A) IGBIAS (mA) CC (V) 1505 G01 1505 G02 1505 G03
Current Limit Amplifier
∆
VFB vs IVA (Voltage Amplifier) CL1 Threshold ICC vs VCC
4 98 15 96 14 3 94 13 (mV) 2 (mA) FB∆V 125°C I CC 92 12 0°C THRESHOLD (mV) 1 25°C 90 11 25°C 125°C 0 88 10 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 25 50 75 100 125 10 13 16 19 22 25 I TEMPERATURE (°C) VA (mA) VCC (V) 1505 G04 1505 G05 1505 G06
PROG Pin Characteristics V Reference Voltage vs Temperature C Pin Characteristics
6 –1.2 2.470 CURRENT FEEDBACK AMPLIFIER OPEN LOOP –1.0 2.468 –0.8 –0.6 125°C 2.466 –0.4 (mA) –0.2 0 25°C 2.464 (mA) 0 I VC I PROG 0.2 2.462 0.4 REFERENCE VOLTAGE (V) 0.6 2.460 0.8 – 6 1.0 2.458 0 1 2 3 4 5 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 25 50 75 100 125 150 JUNCTION TEMPERATURE ( V V °C) PROG (V) C (V) 1505 G07 1505 G09 1505 G08 1505fc 5
