Datasheet LT1511 (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | Constant-Current/Constant-Voltage 3A Battery Charger with Input Current Limiting |
| Páginas / Página | 16 / 4 — ELECTRICAL CHARACTERISTICS The. denotes specifications which apply over … |
| Formato / tamaño de archivo | PDF / 149 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS The. denotes specifications which apply over the full operating
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LT1511
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC = 16V, VBAT = 8V, VMAX (maximum operating VCC) = 28V. No load on any outputs unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Voltage Amplifier VA
Transconductance (Note 3) Output Current from 50µA to 500µA 0.25 0.6 1.3 mho Output Source Current VOVP = VREF + 10mV, VPROG = VREF + 10mV 1.1 mA OVP Input Bias Current At 0.75mA VA Output Current ±3 ±10 nA At 0.75mA VA Output Current, TJ > 90°C – 15 25 nA
Current Limit Amplifier CL1, 8V
≤
Input Common Mode
Turn-On Threshold 0.75mA Output Current 93 100 107 mV Transconductance Output Current from 50µA to 500µA 0.5 1 2 mho CLP Input Current 0.75mA Output Current, VUV ≥ 0.4V 0.3 1 µA CLN Input Current 0.75mA Output Current VUV ≥ 0.4V 0.8 2 mA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
Tested with Test Circuit 2. of a device may be impaired.
Note 4:
A linear interpolation can be used for reference voltage
Note 2:
Tested with Test Circuit 1. specification between 0°C and – 40°C.
W U TYPICAL PERFORMANCE CHARACTERISTICS Thermally Limited Maximum Charging Current Efficiency of Figure 1 Circuit ICC vs Duty Cycle
3.0 100 8 V V CC = 16V 12.6V BATTERY 98 IN = 16.5 7 VBAT = 8.4V 2.8 96 8.4V BATTERY 6 V 94 IN ≥ 11V 5 2.6 4.2V BATTERY 92 0°C VIN ≥ 8V 90 CHARGER EFFICIENCY (mA) 4 125°C 16.8V BATTERY I CC 2.4 88 3 25°C EFFICIENCY (%) 86 INCLUDES LOSS 2 2.2 (θ IN DIODE D3 JA =30°C/W) 84 MAXIMUM CHARGING CURRENT (A) TAMAX=60°C 1 T 82 JMAX =125°C 2.0 80 0 5 10 15 20 25 30 0.2 0.6 1.0 1.4 1.8 2.2 2.6 3.0 0 10 20 30 40 50 60 70 80 INPUT VOLTAGE (V) I DUTY CYCLE (%) BAT (A) 1511 • TPC01 1511 • TPC03 1511 • TPC02 NOTE: FOR 4.2V AND 8.4V BATTERIES MAXIMUM CHARGING CURRENT IS 3A FOR VIN – VBAT ≥ 3V 4
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC = 16V, VBAT = 8V, VMAX (maximum operating VCC) = 28V. No load on any outputs unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Voltage Amplifier VA
Transconductance (Note 3) Output Current from 50µA to 500µA 0.25 0.6 1.3 mho Output Source Current VOVP = VREF + 10mV, VPROG = VREF + 10mV 1.1 mA OVP Input Bias Current At 0.75mA VA Output Current ±3 ±10 nA At 0.75mA VA Output Current, TJ > 90°C – 15 25 nA
Current Limit Amplifier CL1, 8V
≤
Input Common Mode
Turn-On Threshold 0.75mA Output Current 93 100 107 mV Transconductance Output Current from 50µA to 500µA 0.5 1 2 mho CLP Input Current 0.75mA Output Current, VUV ≥ 0.4V 0.3 1 µA CLN Input Current 0.75mA Output Current VUV ≥ 0.4V 0.8 2 mA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
Tested with Test Circuit 2. of a device may be impaired.
Note 4:
A linear interpolation can be used for reference voltage
Note 2:
Tested with Test Circuit 1. specification between 0°C and – 40°C.
W U TYPICAL PERFORMANCE CHARACTERISTICS Thermally Limited Maximum Charging Current Efficiency of Figure 1 Circuit ICC vs Duty Cycle
3.0 100 8 V V CC = 16V 12.6V BATTERY 98 IN = 16.5 7 VBAT = 8.4V 2.8 96 8.4V BATTERY 6 V 94 IN ≥ 11V 5 2.6 4.2V BATTERY 92 0°C VIN ≥ 8V 90 CHARGER EFFICIENCY (mA) 4 125°C 16.8V BATTERY I CC 2.4 88 3 25°C EFFICIENCY (%) 86 INCLUDES LOSS 2 2.2 (θ IN DIODE D3 JA =30°C/W) 84 MAXIMUM CHARGING CURRENT (A) TAMAX=60°C 1 T 82 JMAX =125°C 2.0 80 0 5 10 15 20 25 30 0.2 0.6 1.0 1.4 1.8 2.2 2.6 3.0 0 10 20 30 40 50 60 70 80 INPUT VOLTAGE (V) I DUTY CYCLE (%) BAT (A) 1511 • TPC01 1511 • TPC03 1511 • TPC02 NOTE: FOR 4.2V AND 8.4V BATTERIES MAXIMUM CHARGING CURRENT IS 3A FOR VIN – VBAT ≥ 3V 4