Datasheet LT1769 (Analog Devices) - 4

LT1769
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC = 16V, VBAT = 8V. 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 VA Output Current at 0.5mA ● ±3 ±10 nA VA Output Current at 0.5mA, TA > 90°C ● –15 25 nA VA Output Current at 0.5mA, TA < 0°C ±15 nA
Current Limit Amplifier CL1, 8V
≤
Input Common Mode
Turn-On Threshold 0.5mA Output Current 93 100 110 mV Transconductance Output Current from 50µA to 500µA 0.5 1 2 mho CLP Input Current 0.5mA Output Current, VUV ≥ 0.4V 0.3 1 µA CLN Input Current 0.5mA 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 Efficiency of Figure 1 Circuit ICC vs Duty Cycle ICC vs VCC
100 8 7.0 V V MAXIMUM DUTY CYCLE IN = 16.5 CC = 16V 98 VBAT = 8.4V 7 96 6.5 TJ = 0°C 6 94 TJ = 25°C 92 5 6.0 CHARGER EFFICIENCY TJ = 0°C T 90 (mA) 4 TJ = 125°C (mA) J = 125°C I CC I CC 88 TJ = 25°C 5.5 3 EFFICIENCY (%) 86 INCLUDES LOSS 2 84 IN DIODE D3 5.0 1 82 80 0 4.5 0.2 0.6 1.0 1.4 1.8 2.2 0 10 20 30 40 50 60 70 80 0 5 10 15 20 25 30 IBAT (A) DUTY CYCLE (%) VCC (V) 1769 G01 1769 G02 1769 G03 1769fa 4