MAX8677CETG+ Maxim Integrated Products, MAX8677CETG+ Datasheet
MAX8677CETG+
Specifications of MAX8677CETG+
Related parts for MAX8677CETG+
MAX8677CETG+ Summary of contents
Page 1
... Load Peaks Over Adapter Rating Are Supported by Battery o Input Overvoltage Protection to 16V o 40mΩ System-to-Battery Switch o Thermal Regulation Prevents Overheating o PREQ, CHG, DOK, UOK, and FLT Indicators o 4.35V (typ) SYS Regulation Voltage PART MAX8677CETG+ -40°C to +85°C Applications + Denotes a lead-free package Exposed paddle. CHG SYS SYS DOK ...
Page 2
Dual-Input USB/AC Adapter Charger and Smart Power Selector ABSOLUTE MAXIMUM RATINGS DC, PEN1 to GND .................................................-0.3V to +16V USB to GND .............................................................-0. GND ................................................................-0.3V to +4V BAT, SYS, CEN, USUS, PEN2, TSET to GND...........-0.3V to ...
Page 3
Dual-Input USB/AC Adapter Charger ELECTRICAL CHARACTERISTICS (continued) = 5V, THM = CEN = USUS = GND -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER USB-TO-SYS PREREGULATOR USB Operating Range ...
Page 4
Dual-Input USB/AC Adapter Charger and Smart Power Selector ELECTRICAL CHARACTERISTICS (continued) = 5V, THM = CEN = USUS = GND -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER R ...
Page 5
Dual-Input USB/AC Adapter Charger (T = +25°C, unless otherwise noted.) A USB QUIESCENT CURRENT vs. USB VOLTAGE (CHARGER ENABLED BAT USUS 0.9 CHARGER IN 0.8 DONE MODE 0.7 SYS ...
Page 6
Dual-Input USB/AC Adapter Charger and Smart Power Selector (T = +25°C, unless otherwise noted.) A NORMALIZED CHARGE CURRENT vs. AMBIENT TEMPERATURE (LOW IC POWER DISSIPATION) 1.0100 USB BAT 1.0075 1.0050 1.0025 1.0000 0.9975 ...
Page 7
Dual-Input USB/AC Adapter Charger (T = +25°C, unless otherwise noted.) A CHARGE PROFILE —1400mAh BATTERY ADAPTER INPUT—1A CHARGE 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 TIME (min) DC CONNECT WITH USB ...
Page 8
Dual-Input USB/AC Adapter Charger and Smart Power Selector (T = +25°C, unless otherwise noted.) A USB DISCONNECT WITH 20Ω) SYS V USB I USB V SYS V UOK V CHG 200μs/div PIN NAME Charge Prequal ...
Page 9
Dual-Input USB/AC Adapter Charger PIN NAME USB High/Low Control. PEN2 sets the DC or USB current limit to 100mA (PEN2 low) or 500mA (PEN2 high). 6 PEN2 PEN2 controls both DC and USB current limits when PEN1 is low. ...
Page 10
Dual-Input USB/AC Adapter Charger and Smart Power Selector MANAGEMENT DC AC ADAPTER PWR OK DOK MANAGEMENT USB USB PWR OK UOK PEN1 DC MODE 500mA PEN2 USB 100mA USUS USB LIMIT CURRENT LIMIT SUSPEND PSET DC LIMIT Figure 1. ...
Page 11
Dual-Input USB/AC Adapter Charger R PU 560kΩ 1 PREQUAL ADAPTER 4.7μF 3 OFF 4 CHARGE ON 5 500mA 6 100mA 7 R PSET 0.1μ 0.068μ ISET 12 ...
Page 12
Dual-Input USB/AC Adapter Charger and Smart Power Selector MINI 5-STYLE PREQUAL CONNECTOR 1 VBUS 4.7μ OFF GND CHARGE DC-USB USB 500mA 100mA 10kΩ Figure ...
Page 13
Dual-Input USB/AC Adapter Charger Table 1. External Components List for Figures 2 and 3 COMPONENT FUNCTION (FIGURES Input filter capacitor filter capacitor C SYS output bypass capacitors SYS C Battery bypass capacitor BAT ...
Page 14
Dual-Input USB/AC Adapter Charger and Smart Power Selector The input voltage limiter is essentially an LDO regulator. While in dropout, the regulator dissipates a small I through the 0.2Ω MOSFET (Q1, Figure 4) between DC and SYS. With an ...
Page 15
Dual-Input USB/AC Adapter Charger When the input current limit is reached, the first action taken by the MAX8677C is to reduce the battery charge current. This allows the regulator to stay in dropout 4.35V, during heavy loads, ...
Page 16
Dual-Input USB/AC Adapter Charger and Smart Power Selector V < 2.8V BATT RESET TIMER ANY CHARGING STATE THM OK THM NOT OK TIMER RESUME TIMER SUSPEND TEMPERATURE SUSPEND I = 0mA CHG UOK OR DOK = PREVIOUS STATE CHG ...
Page 17
Dual-Input USB/AC Adapter Charger Charge Enable ( CEN ) When CEN is low, the charger is on. When CEN is high, the charger turns off. CEN does not affect the SYS out- put. In many systems, there is no ...
Page 18
Dual-Input USB/AC Adapter Charger and Smart Power Selector When the MAX8677C is used in conjunction with a µP, connect a pullup resistor between PREQ and the logic I/O voltage to indicate charge status to the µP. Alternatively, PREQ can ...
Page 19
Dual-Input USB/AC Adapter Charger For a typical 10kΩ (at +25°C) thermistor and a 10kΩ R resistor, the charger enters a temperature suspend TB state when the thermistor resistance falls below 3.97kΩ (too hot) or rises above 28.7kΩ (too cold). ...
Page 20
Dual-Input USB/AC Adapter Charger and Smart Power Selector (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 20 ______________________________________________________________________________________ Package Information ...
Page 21
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 21 © 2007 Maxim Integrated Products ...