OB2633MP

OB2633 High Efficiency, Adaptive Multi-Mode PWM Controller GENERAL DESCRIPTION FEATURES OB2633 is a highly integrated QuasiResonant(QR) controller with adaptive multi-mode regulation, optimized for high performance, low EMI, low standby power consumption and wide output voltage range Quick Charger(QC) solutions, together with secondary -side controllers, such as OB200x and OB2603x supporting Qualcomm Quick Charge QC3.0 protocol. The controller is as well compatible with cost effective offline flyback converter applications covering a wide output range. At normal load condition, it operates in QR mode in high line input voltage. To minimize switching loss, the maximum switching frequency in QR mode is internally limited to 75 KHz. When the loading goes low, it operates in PFM mode with valley switching for high power conversion efficiency. When the load is very small, the IC operates in ‘Extended Burst Mode’ to minimize the standby power loss. Additionally, in the low line input voltage, the IC operates in fixed frequency (55KHz) CCM mode at the heavy loading. As a result, high conversion efficiency can be achieved in the whole loading range. OB2633 offers complete protection including cycle-by-cycle current limiting (OCP), over load protection (OLP), over temperature protection (OTP), output short protection (SCP), output under voltage protection (UVP), output and VDD over voltage protection. Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique. The tone energy at below 22KHz is minimized to avoid audio noise during operation. OB2633 is offered in SOT23-6 package. ■ Very wide range of supply voltage Multi-Mode Operation 75KHz maximum clamping frequency in QR mode @ Full Load in high line voltage 55KHz minimum clamping frequency in CCM mode @ Heavy Load in low line voltage Valley switching operation @ Green mode Burst Mode @ Light Load & No Load ■ Power on soft start reducing MOSFET Vds stress ■ Extended burst mode control for improved efficiency and low standby power ■ Soft Start for elimination output over shoot ■ Adaptive loop gain compensation with Iovp current detection ■ Adaptive Frequency shuffling for EMI ■ Low operating current at no/light load ■ Audio noise free operation ■ Comprehensive auto-recovery protection o VDD under voltage lockout with hysteresis (UVLO) o Cycle-by-cycle over current protection (OCP) o Overload protection (OLP) o Over temperature protection (OTP) o VDD over voltage protection o Output over voltage protection o Output short protection (SCP) o Output under voltage protection (UVP) o Output diode short protection co nf id en tia lt o 派 一 ■ ht APPLICATIONS Br ig Offline AC/DC flyback converter for ■ Quick-charging AC/DC charges ■ AC/DC Adapters with wide output range O n- TYPICAL APPLICATION ©On-Bright Electronics Confidential 1 Preliminary Datasheet OB_DOC_DS_263300 OB2633 High Efficiency, Adaptive Multi-Mode PWM Controller GENERAL INFORMATION 1 6 Gate FB 2 5 VCC PRT 3 4 CS lt o Ordering Information Part Number Description OB2633MP SOT23-6, Halogen-free in T&R -40 to 150 ℃ -20 to 85 ℃ -55 to 150 ℃ 260 ℃ listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute maximum-rated conditions for extended periods may affect device reliability. en tia Package Dissipation Rating Package RJA(℃/W) SOT23-6 200 Value 54V -0.3 to 7V -0.3 to 7V -0.3 to 7V 派 GND Absolute Maximum Ratings Parameter VCC DC Supply Voltage FB Input Voltage CS Input Voltage PRT Input Voltage Min/Max Operating Junction Temperature TJ Operating Ambient Temperature TA Min/Max Storage Temperature Tstg Lead Temperature (Soldering, 10secs) Note: Stresses beyond those 一 Pin Configuration ht co nf id Recommended operating condition Symbol Parameter Range VCC VCC Supply Voltage 12 to 48V M:SOT23-6 P:Green (Halogen-free) 633YWW . ZZZ S O n- Br ig Marking Information Y:Year Code WW:Week Code(01-52) ZZZ: Lot code A:Character Code S: Internal code ©On-Bright Electronics Confidential -2- Preliminary Datasheet OB_DOC_DS_263300 OB2633 High Efficiency, Adaptive Multi-Mode PWM Controller TERMINAL ASSIGNMENTS Pin Name I/O Description 1 GND P Ground 2 FB I Feedback input pin. The PWM duty cycle is determined by voltage level into this pin and the current-sense signal at Pin CS. 一 Pin Num. PRT I 4 CS I Current sense input 5 VCC P Power Supply 6 Gate O Totem-pole gate driver output for power MOSFET O n- Br ig ht co nf id en tia lt o 派 3 Multiple functions pin. Connecting a NTC resistor to ground for OTP detection. Connecting a resistor from Vaux can adjust IOVP, ISCP, IUVP trigger current and detect transformer core demagnetization. If all protections are needed, a diode should be connected between PRT pin and the NTC resistor. ©On-Bright Electronics Confidential 3 Preliminary Datasheet OB_DOC_DS_263300 OB2633 High Efficiency, Adaptive Multi-Mode PWM Controller O n- Br ig ht co nf id en tia lt o 派 一 BLOCK DIAGRAM ©On-Bright Electronics Confidential 4 Preliminary Datasheet OB_DOC_DS_263300 OB2633 High Efficiency, Adaptive Multi-Mode PWM Controller ELECTRICAL CHARACTERISTICS Test Conditions VDD Start up Current I_VDD_Operation I_VDD_Burst Normal Operation Current Burst Operation Current VDD Under Voltage Lockout Exit (Recovery) VDD Under Voltage Lockout Enter Pull-up PMOS active UVLO(ON) Vpull-up TD_ Openloop 16.5 17.5 V 3.5 V/V 4.5 V/V 12 us 2.2 V The threshold exit burst mode 1.25 V The threshold mode 1.15 V 210 uA 25 KΩ 4.5 V en tia id n- VTH_Openloop mA mA V FB=3V Ramp up VDD until gate clock is off Iovp>96uA with Hysteresis IovpVth3, Figure 1), there are two situations: firstly, if the system input is in low line input range, the IC operates in fixed frequency CCM mode. Thus, small size Confidential 9 Preliminary Datasheet OB_DOC_DS_263300 OB2633 High Efficiency, Adaptive Multi-Mode PWM Controller transformer can be used with high power conversion efficiency. Secondly, if the system input is in high line input range, the IC operates in QR mode. In this way, high power conversion efficiency can be achieved in the universal input range when system is at full loading conditions. At normal operating conditions (Vth2