Document
InnoSwitch3-CP Family
Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary Switch, Synchronous Rectification, FluxLink Feedback and Constant Power Profile
Product Highlights
Highly Integrated, Compact Footprint • Up to 94% efficiency across full load range • Quasi-Resonant (QR) / CCM flyback controller, high-voltage switch4,
secondary-side sensing and synchronous rectification driver • Integrated FluxLink™, HIPOT-isolated, feedback link • Easily interfaces to load-directed and fast charge protocol ICs • Constant Power (CP) Profile minimizes charging time with continuous
adjustment of output current and voltage • Accurate CV/CC/CP, independent of external components • External IS resistor allows custom CC programming • Instantaneous transient response with 0%-100%-0% load step • PowiGaN™ technology – up to 100 W without heat sinks (INN3278C,
INN3279C and INN3270C)
EcoSmart™ – Energy Efficient • Less than 30 mW no-load including line sense • Easily meets all global energy efficiency regulations • Low heat dissipation
Advanced Protection / Safety Features • Secondary switch or diode short-circuit protection • Open SR FET-gate detection • Fast input line UV/OV protection
Optional Features • Cable-drop compensation with multiple settings • Variable output voltage, constant current profiles • Auto-restart or latching fault response for output OVP/UVP • Multiple output UV fault thresholds • Latching or hysteretic primary over-temperature protection
Full Safety and Regulatory Compliance • Reinforced isolation • Isolation voltage >4000 VAC • 100% production HIPOT testing • UL1577 isolation voltage 4000 VAC (max), TUV (EN62368-1),
CQC (GB4943.1) and DIN VDE V 0884-11 safety approved • Excellent noise immunity enables designs that achieve class “A”
performance criteria for EN61000-4 suite; EN61000-4-2, 4-3 (30 V/m), 4-4, 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m)
Green Package • Halogen free and RoHS compliant
Applications • High efficiency flyback designs up to 100 W • USB PD / QC / proprietary protocol chargers
Description
The InnoSwitch™3-CP family of ICs dramatically simplifies the design and manufacture of flyback power converters, particularly those requiring high efficiency and/or compact size. The InnoSwitch3-CP family incorporates primary and secondary controllers and safety-rated feedback into a single IC.
InnoSwitch3-CP family devices incorporate multiple protection features including line over and undervoltage protection, output overvoltage and over-current limiting, and over-temperature shutdown. Devices are available that support the common combinations of latching and auto-restart behaviors required by applications such as quick charge and USB PD designs. The devices are available with and without cable-drop compensation.
SR FET
FWD SR GND BPS FB
D InnoSwitch3-CP
Primary Switch and Controller
S
V BPP
Figure 1. Typical Application Schematic.
VOUT
RS
IS Secondary Control IC
PI-8322-072419
Figure 2. High Creepage, Safety-Compliant InSOP-24D Package.
Output Voltage (V) PI-8321-082317
VPK
CC set by IS pin resistor (RS)
Output Current (A)
Figure 3. Typical Constant Power Characteristics.
Output Power Table
Product 3,4
230 VAC ± 15%
Adapter1
Open Frame2
85-265 VAC
Adapter1
Open Frame2
INN3264C/3274C 20 W
25 W
15 W
20 W
INN3265C/3275C 25 W
30 W
22 W
25 W
INN3266C/3276C 35 W
40 W
27 W
36 W
INN3277C
40 W
45 W
36 W
40 W
INN3267C
45 W
50 W
40 W
45 W
INN3268C
55 W
65 W
50 W
55 W
INN3278C
70 W
75 W
55 W
65 W
INN3279C
80 W
85 W
65 W
75 W
INN3270C
90 W
100 W
75 W
85 W
Table 1. Output Power Table. Notes: 1. Minimum continuous power in a typical non-ventilated enclosed adapter
measured at 40 °C ambient. (package temperature <125 °C). 2. Minimum peak power capability. 3. Package: InSOP-24D. 4. INN326x ‒ 650 V MOSFET, INN3274-77 ‒ 725 V MOSFET,
INN3278 / INN3279 / INN3270 ‒ 750 V PowiGaN switch.
www.power.com
This Product is Covered by Patents and/or Pending Patent Applications.
November 2022
+ + +
+
InnoSwitch3-CP
DRAIN (D)
GATE
UNDER/OVER INPUT VOLTAGE (V)
PRIMARY BYPASS REGULATOR
PRIMARY BYPASS (BPP)
LINE INTERFACE
UV/OV GATE
ENABLE BPP/UV
AUTO-RESTART COUNTER
RESET
PRIM-CLK
OSCILLATOR/
TIMERS
JITTER
ENABLE FAULT
PRIMARY BYPASS PIN CAPACITOR SELECT AND
CURRENT LIMIT
PRIMARY BPP/UV BYPASS PIN
UNDERVOLTAGE
VILIM
VSHUNT VBP+
Power Switch
SenseFET IS
THERMAL SHUTDOWN
tON(MAX) tOFF(BLOCK)
GATE
GATE BPP
OV/UV
DRIVER LEB
BPP/UV ILIM
QS QR
FAULT
SecREQ
PRIM/SEC
tOFF(BLOCK)
SECLATCH
SecPulse PRIM/SEC
RECEIVER CONTROLLER
PRIM-CLK
From Secondary Controller
+
VILIM
-
tON(MAX)
LATCH-OFF/ AUTO-RESTART
PRIMARY OVP LATCH/
AUTO-RESTART
SOURCE (S)
Figure 4. Primary Controller Block Diagram.
PI-8044h-111219
FORWARD (FWD)
SYNCRONOUS RECTIFIER DRIVE (SR)
OUTPUT VOLTAGE (VOUT)
VOUT
INH
ENABLE SR
SR CONTROL
FORWARD BPSUV
REGULATOR V.