Rainbow Electronics MAX8730 - Manual (Page 8)

MAX8730
Low-Cost Battery Charger
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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
REFERENCES
REF Output Voltage Ref 0 < IREF < 500µA 4.16 4.24 V
REF Undervoltage Lockout
Threshold
REF falling 3.9 V
SWREF Output Voltage 8.0V < VSRC < 28V, no load 3.224 3.376 V
SWREF Load Regulation 0.1mA < ISWREF < 20mA 50 mV
TRIP POINTS
ACIN Threshold ACIN rising 2.037 2.163 V
SWITCHING REGULATOR
DHI Off-Time V BATT = 16.0V 300 400 ns
DHI Off-Time K Factor V BATT = 16.0V 4.8 6.4 V x µs
Cycle-by-Cycle Current-Limit
Sense Voltage
160 240 mV
DHIV Output Volatge With respect to SRC -4.3 -5.5 V
DHIV Sink Current 10 mA
DHI Resistance Low I DHI = -10mA 4 Ω
DHI Resistance High I DHI = 10mA 2 Ω
ERROR AMPLIFIERS
V C TL = 3.6V , V BAT T = 16.8V , M OD E = LD O 0.0625 0.250
GMV Loop Transconductance
V C TL = 3.6V , V
BAT T
= 12.6V , M OD E = FLOAT 0.0833 0.333
mA/V
GMI Loop Transconductance ICTL = 3.6V, V CSSP - V CSIN = 75mV 0.5 2 mA/V
GMS Loop Transconductance V CLS = 2.048V, V CSSP - V CSSN = 75mV 0.5 2 mA/V
CCI/CCS/CCV Clamp Voltage
1.1V < V CCV < 3.0V, 1.1V < V CCI < 3.0V,
1.1V < V CCS < 3.0V
150 600 mV
LOGIC LEVELS
M OD E , RE FON Inp ut Low V ol tag e 0.5 V
MODE Input Middle Voltage 1.9 3.3 V
M OD E , RE FON Inp ut H i g h V ol tag e 3.4 V
V INPON rising 2.2
INPON Threshold
V INPON falling 0.8
V
ADAPTER DETECTION
ACOK Voltage Range 0 28 V
ACOK Sink Current V ACOK = 0.4V, ACIN = 1.5V 1 mA
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V SRC = V ASNS = V CSSP = V CSSN = 18V, V BATT = V CSIP = V CSIN = 12V, V VCTL = V ICTL = 1.8V, MODE = float,
ACIN = 0, CLS = REF, REFON = LDO, INPON = LDO, RELTH = 2V. T A = -40°C to +85°C, unless otherwise noted.)