PDF《LDR6022 USB Type-C PD Controller》

2 31 SEL I System Reference input, connect 100K to GND

32 VBEN O VBUS Enable PAD PAD G Ground Type: P-Power;

GCGround;

I-Input;

O-Output;

IO-Input/Output. LDR6022 USB Type-C PD 3.0 Controller 6?/?15? 2.?Functions?? 2.1. Fixed voltage output mode (Default) ? In?this?mode?LDR6022?can?be?configured?by?WATx?pins?and?FBDx?pins?to? provide?normal?USB?PD?Profiles,?or?user?defined?power?profiles.?? Table1. WAT1 and WAT2 functions WAT1 WAT2 Max Power(W)

0 0

24 1

0 30

0 1

45 1

1 60(default) Table2. FBDx Functions FBD1 FBD2 FBD3 FBD4 Power profiles GND GND GND GND 5V Only FB Resistor GND GND GND 5V/9V FB Resistor FB Resistor GND GND 5V/9V/12V FB Resistor FB Resistor FB Resistor GND 5V/9V/12V/15V FB Resistor FB Resistor FB Resistor FB Resistor 5V/9V/12V/15V/20V FB Resistor GND FB Resistor FB Resistor 5V/9V/15V/20V *in?fixed?voltage?output?mode?FBA?pin?is?ignored? Figure?3.?FBDx?Functions LDR6022 USB Type-C PD 3.0 Controller 7?/?15? The?output?voltage?is?set?using?a?resistive?voltage?divider?from?the?output?voltage? to?FBD.?The?voltage?divider?divides?the?output?voltage?down?by?the?ratio:? V V R R R ? In?most?case?of?AC-DC?application,?the?VFBD?is?determine?by?TL431,?A?typical? value?for?the?voltage?divider?RH?is?12.7KΩ,?and?RL?is?12.1KΩ.? Thus,?to?change?the?output?voltage,?the?FB?Resistor?(R1/R2/R3/R4)?will?be?set?by? the?following?formula:? R R R V R V R V R V ? ? 2.2 PPS Output Mode ? LDR6022?is?able?to?send?Programmable?Power?Supply?APDO?to?SNK.?The?data? structure?of?the?APDO?is?described?in?the?Table?6-13?of?USB?PD3.0?Spec?V1.1.?? Table?3?Data?Structure?of?Programmable?Power?Supply?APDO? ? If?the?connected?SNK?request?an?APDO?that?can?be?satisfied,?LDR6022?will?enter? PPS?output?mode?and?reply?accept.?In?this?mode?LDR6022?is?able?to?provide?3V?to?21V? fixed?voltage?output?step?by?20mV?according?to?the?RDO?of?the?SNK.? ? Table?4?Programmable?Request?Data?Object? LDR6022 USB Type-C PD 3.0 Controller 8?/?15? 2.2 Linear fixed voltage output mode In?this?mode?LDR6022?is?able?to?provide?3V?to?20V?fixed?voltage?output?step?by? 50mV?according?to?the?sink?capability?messages?provided?by?the?SNK.??By?sending? request?messages?with?capability?mismatch?bit,?SNK?is?able?to?change?the?output? voltage?dynamically,?but?the?maximum?power?is?limited?by?the?WATX?configure? according?to?Table-1?and?the?maximum?output?voltage?is?limited?by?the?FBDX? configure?according?to?Table-2.?If?there?is?not?e-marker?cable?detected?the?maximum? current?will?be?limited?to?3A.? In?order?to?enter?this?mode,?the?capability?mismatch?field?bit?of?the?request? message?that?sent?by?the?sink?shall?be?set?to?1'

b.??After?evaluating?this?special?request,? LDR6022?will?finish?the?current?power?negotiation?process?with?accept/ps_ready?or? reject.??After?that,?LDR6022?will?send?a?get?sink?capability?message?to?make?sure?how? to?match?the?SNK'

s?request.?If?the?SNK?answer?with?a?fixed?type?sink?capability? message,?LDR6022?will?enter?the?linear?fixed?voltage?output?mode.?And?create?a?new? source?capability?message?according?to?the?sink?capability?message?and?the?maximum? power.? In?this?mode,?if?the?cc?connection?is?reset?or?a?hard?reset?message?is?sent,? LDR6022?will?return?to?the?default?fixed?voltage?output?mode.?(2.1)? In?this?mode,?if?the?sink?sends?a?variable?type?sink?capability?messages?LDR6022? will?change?to?the?constant?current?output?mode.?(2.3)? The?detail?communication?process?is?shown?as?Figure?4?and?Figure?5? LDR6022 USB Type-C PD 3.0 Controller 9?/?15? Figure?4.?Linear?fixed?voltage?output?mode? Figure?5.?Sink?request?to?increase?50mV?voltage? LDR6022 USB Type-C PD 3.0 Controller 10?/?15? 2.3. Const Current output mode In?this?mode?LDR6022?is?able?to?provide?0.1A?to?5A?constant?current?output?step? by?100mA?according?to?the?variable?type?sink?capability?messages?provided?by?the? SNK.??By?sending?request?messages?with?capability?mismatch?bit,?SNK?is?able?to? change?the?output?current?dynamically.?LDR6022?will?automatically?control?the?output? voltage?between?the?maximum?voltage?which?is?defined?by?Bit20?to?Bit29?of?the? variable?type?PDO?and?the?minimum?voltage?which?is?defined?by?Bit10?to?Bit19?of?the? variable?type?PDO.?If?fail?to?achieve?the?specified?current?output?between?the? maximum?and?minimum?voltage,?LDR6022?will?output?the?maximum?voltage?in?case? the?current?is?less?than?the?specified?current?or?minimum?voltage?on?the?other?hand.?? Anyway,?the?maximum?power?is?limited?by?the?WATX?configure?according?to?Table-1? and?the?maximum?output?voltage?is?limited?by?the?FBDX?configure?according?to?Table- 2.?If?there?is?not?e-marker?cable?detected,?the?maximum?current?will?be?limited?to?3A.? In?order?to?enter?this?mode,?the?capability?mismatch?field?bit?of?the?request? message?which?sends?by?a?sink?shall?be?set?to?1'