HM100 データシートの表示（PDF） - Unspecified

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HM100

QC2.0 Interface Module

Unspecified 

HM100

QC2.0 Interface Module

above VDAT(REF) (typ. 0.325 V) and below is pulled down by resistor RDAT(LKG) (see Figure

VSEL(REF) (typ. 2 V ) for at least 1.25 seconds 1). Once it drops below 0.325 V HM100 will turn

HM100 will enter Quick Charge 2.0 op eration on switch N5 (thereby short-circuiting D+ and

mode. If the voltage at D+ drops any time below D-) and turns off switches N1 to N4. This sets

0.325 V HM100 resets the 1.25 seconds timer and the default output voltage of 5 V . The

stays in USB Battery Charging Specification 1.2 recommended value for RDAT(LKG) = 390 kΩ.

compatibility mode with a default output voltage

of 5 V.

Once HM100 has entered Quick Charge 2.0

operation mode switch N5 will be turned off.

Additionally switch N4 is turned on connecting a

19.53 kΩ pull-down resistor to D-. As soon as

Vo1(5V)=VFB*((R1/R2)+1);

Vo2(9V)= VFB*((R1/ RX1)+1), RX1=R2//R3;

Vo3(12V)= VFB*((R1/ RX2)+1), RX2=RX1//R4;

Vo4(20V)= VFB*((R1/ RX3)+1), RX3=RX2//R5;

the voltage at D- has dropped low (<0.325 V) for

at least 1 ms HM100 starts accepting requests for

different AC-DC adapter output voltages by

means of applied voltage levels at data lines D+

and D- through the powered device. Table 1

summarizes the output voltage lookup table,

corresponding AC-DC adapter output voltages

and status of switches N1 to N3.

For Quick Charge 2.0 C lass A support only, the

V3 pin has to be connected to the BYPASS pin

(directly or through a resistor up to 100 kΩ).

This will inhibit any requests for setting a 20 V

output.

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