Datasheet LTC4008 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 4A, High Efficiency, Multi-Chemistry Battery Charger |
| Pages / Page | 24 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). … |
| Revision | C |
| File Format / Size | PDF / 237 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted). INFET Response Time to. Reverse Current. VFB vs DCIN
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Text Version of Document
LTC4008
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) INFET Response Time to Reverse Current VFB vs DCIN
0.05 Vgs OF PFET (2V/DIV) Vgs = 0 0 V –0.05 s OF PFET (5V/DIV) (%) V FB –0.10 Vs = 0V –0.15 Id (REVERSE) OF PFET (5A/DIV) Id = 0A –0.20 1.25µs/DIV 6 11 16 21 26 TEST PERFORMED ON DEMOBOARD DCIN (V) VIN = 15VDC VCHARGE = 12.6V 4008 G02 CHARGER = ON INFET = 1/2 Si4925DY ICHARGE = <10mA 4008 G01
BATMON Offset VOUT vs IOUT
0.02 0 BATMON LOAD = 100kΩ –0.5 0 –1.0 (V) –1.5 –0.02 –2.0 BATMON –0.04 –2.5 - V –3.0 –0.06 –3.5 V BATTERY –4.0 –0.08 DCIN = 15V OUTPUT VOLTAGE ERROR (%) DCIN = 20V –4.5 DCIN = 20V DCIN = 24V VBAT = 12.6V –0.10 –5.0 3 8 13 18 23 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 BATTERY VOLTAGE (V) OUTPUT CURRENT (A) 4008 G03 4008 G04
Disconnect/Reconnect Battery PWM Frequency vs Duty Cycle (Load Dump)
350 300 3A STEP 250 1A STEP 1A STEP VFLOAT 200 1V/(DIV) 150 PROGRAMMED CURRENT = 10% 100 3A STEP PWM FREQUENCY (kHz) LOAD STATE DISCONNECT RECONNECT 50 DCIN = 15V DCIN = 20V DCIN = 24V 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 LOAD CURRENT = 1A, 2A, 3A DUTY CYCLE (VOUT/VIN) DCIN = 20V VFLOAT = 12.6V 4008 G05 4008 G06 Rev C For more information www.analog.com 5 Document Outline Description Typical Application Absolute Maximum Ratings Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Operation Applications Information Package Description Revision History Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise noted) INFET Response Time to Reverse Current VFB vs DCIN
0.05 Vgs OF PFET (2V/DIV) Vgs = 0 0 V –0.05 s OF PFET (5V/DIV) (%) V FB –0.10 Vs = 0V –0.15 Id (REVERSE) OF PFET (5A/DIV) Id = 0A –0.20 1.25µs/DIV 6 11 16 21 26 TEST PERFORMED ON DEMOBOARD DCIN (V) VIN = 15VDC VCHARGE = 12.6V 4008 G02 CHARGER = ON INFET = 1/2 Si4925DY ICHARGE = <10mA 4008 G01
BATMON Offset VOUT vs IOUT
0.02 0 BATMON LOAD = 100kΩ –0.5 0 –1.0 (V) –1.5 –0.02 –2.0 BATMON –0.04 –2.5 - V –3.0 –0.06 –3.5 V BATTERY –4.0 –0.08 DCIN = 15V OUTPUT VOLTAGE ERROR (%) DCIN = 20V –4.5 DCIN = 20V DCIN = 24V VBAT = 12.6V –0.10 –5.0 3 8 13 18 23 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 BATTERY VOLTAGE (V) OUTPUT CURRENT (A) 4008 G03 4008 G04
Disconnect/Reconnect Battery PWM Frequency vs Duty Cycle (Load Dump)
350 300 3A STEP 250 1A STEP 1A STEP VFLOAT 200 1V/(DIV) 150 PROGRAMMED CURRENT = 10% 100 3A STEP PWM FREQUENCY (kHz) LOAD STATE DISCONNECT RECONNECT 50 DCIN = 15V DCIN = 20V DCIN = 24V 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 LOAD CURRENT = 1A, 2A, 3A DUTY CYCLE (VOUT/VIN) DCIN = 20V VFLOAT = 12.6V 4008 G05 4008 G06 Rev C For more information www.analog.com 5 Document Outline Description Typical Application Absolute Maximum Ratings Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Operation Applications Information Package Description Revision History Related Parts
