GR8835ACG

GR8835A Green-Mode PWM Controller with Integrated Protections Features Applications  Current mode PWM   Very low startup current  Under-voltage lockout (UVLO)  Non-audible-noise green-mode control  Programmable switching frequency Description  Cycle-by-cycle peak current limiting The GR8835A is a highly-integrated, low startup  Internal leading-edge blanking current, current mode PWM controller with  Internal slope compensation Green-mode function. This function enables the  Internal 4ms soft start (Fs=65KHz) power supply to easily meet even the strictest  VCC over voltage clamp power conservation requirements. The integrated  Gate output voltage clamp functions also include the leading-edge blanking  Soft driving for reducing EMI of  Over-voltage protection (OVP) on VCC Pin compensation,  Over-load protection (OLP) limiting and soft start. OLP, OCP and OVP provide  Over-current protection (OCP) on CS Pin protection performance for fault conditions.  300mA driving capability protect the external power MOSFET from being ● Switching AC/DC power adapter and battery charger  Open-frame SMPS the current sensing, internal cycle-by-cycle peak slope current To Meet the standard of Green Partner, SONY damaged by supply over voltage, the GR8835A SS-00259 gate voltage is clamped about 18V. The GR8835A improves the performance and reduces the cost of power supplies. It is with both 8-pin DIP and 6-pin SOT-26 package. Ordering and Marking Information GR8835A Package Code RoHS Code J: DIP-8 C: SOT-26 G: Green (Halogen Free) Device DIP-8 SOT-26 GR8835A X X XXX 35A X X XXX Code 1 Serial No. Code 1 Code 2 Serial No. Code 2 Code 1 Year 8 2008 9 A 2009 2010 B 2011 Code 2 1 2 3 4 Month Jan. Feb. Mar. Apr. G 2016 ● ● ● H 2017 I 2018 J 2019 9 A B C Sep. Oct. Nov. Dec. Grenergy OPTO Inc. reserves the right to make changes to improve reliability or manufacture ability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 1 GR8835A Pin Configuration Pin Description Pin No. Name Function 1 GND 2 COMP 3 RT Connecting a resistor to ground, this resistor determine the switching frequency 4 CS Current sense pin, connect to sense the MOSFET current 5 VCC Ground Voltage feedback pin, by connecting a photo-coupler to control the duty cycle Power supply pin 6 OUT The output driver for driving the external MOSFET Note: Pin No. is only for SOT-26 package. Absolute Maximum Ratings Supply Voltage VCC COMP, RT, CS --------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- Junction temperature 32V －0.3 ~ 7V ----------------------------------------------------------------------------------------------------- 150℃ Operating ambient temperature --------------------------------------------------------------------------------- －40℃ ~ 85℃ Storage temperature range -------------------------------------------------------------------------------- SOT-26 package thermal resistance －65℃ ~ 150 ℃ ------------------------------------------------------------------------------ Power dissipation (SOT-26, at Ambient Temperature = 85℃) Power dissipation (DIP-8, at Ambient Temperature = 85℃) Lead temperature (All Pb Free Packages, Soldering, 10 sec) ----------------------------------------------- 250mW ---------------------------------------------------- 650mW -------------------------------------------------- 260℃ ------------------------------------------------------------------------- 3KV ------------------------------------------------------------------------------ 250V ESD voltage protection, human body model ESD voltage protection, machine model 250℃/W 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 2 GR8835A Recommended Operating Conditions Item Min. Max. Unit Supply voltage VCC 11 25 V Switching Frequency 50 130 KHz Block Diagram 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 3 GR8835A Electrical Characteristics (TA = +25℃ unless otherwise stated, Vcc = 15.0V) Parameter Pin Min. Typ. Max. Unit SUPPLY VOLTAGE Startup current 5 8 20 uA Operating current (with 1nF load on OUT pin), Vcomp = 0V 5 2.0 3.0 mA Operating current (with 1nF load on OUT pin), Vcomp = 2.5V 5 2.5 mA 5 0.5 mA Operating current (with 1nF load on OUT pin), protection tripped (OLP, OVP) UVLO(off) 5 8.0 9.0 10.0 V UVLO(on) 5 14.0 15.0 16.5 V OVP level on VCC pin 5 26.5 28 29.5 V VCC zener clamp 5 32 Short circuit current, Vcomp = 0V 2 1.5 Open loop voltage, COMP pin open 2 5.4 V Green-mode threshold voltage 2 1.2 V V VOLTAGE FEEDBACK 2.2 mA CURRENT SENSING Maximum input voltage, Vcs (off) 4 Leading edge blanking time 4 Input impedance 4 Delay to output 4 0.76 0.8 0.87 350 V nS 1 MΩ 100 nS OSCILLATOR Frequency (RT = 100KΩ) 3 60 65 70 Green mode frequency (RT = 100KΩ) 3 Temp. stability (－40°C ~ 110°C) 3 3 % Voltage stability (Vcc = 11V ~ 25V) 3 3 % Output low level, VCC = 15V, Io = 20mA 6 1 V Output high level, VCC = 15V, Io = 20mA 6 Rising time, load capacitance = 1000pF 6 350 Falling time, load capacitance = 1000pF 6 30 VGATE-clamp (VCC = 25V ) 6 18 V OLP trip level, Vcomp (OLP) - 3.6 V OLP delay time (note), Fs = 65KHz - 60 mS 20 KHz KHz GATE DRIVER OUTPUT 8 V nS 100 nS OLP Note: Pin No. is only for SOT-26 package. 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 4 GR8835A Typical Performance Characteristics 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 5 GR8835A Typical Performance Characteristics (Cont.) 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 6 GR8835A Application Information Start-up Current Green-Mode Operation The typical start-up current is 8uA. Very low When the load decreases to an extent, the start-up current allows the PWM controller to frequency of the controller will decrease so as to increase the value of start-up resistor and then reduce reduce the power dissipation on it. minimum frequency is about 20 KHz, which is the system power consumption. The outside the audio range. Under-voltage Lockout (UVLO) A hysteresis UVLO comparator is implemented in Leading-Edge Blanking (LEB) GR8835A, then the turn-on and turn-off thresholds Each time the power MOSFET is switched on, a level are fixed at 16V/15V and 10V/9V respectively. turn-on spike will inevitably occur at the sense This hysteresis shown in Fig.13 ensures that the resistor. To avoid fault trigger, a 350ns leading-edge start-up capacitor will be adequate to supply the blanking time is built in. chip during start-up. can therefore be omitted. Conventional RC filtering During this blanking period, the current-limit comparator is disabled and Vcc can not switch off the gate driver. Internal Slope Compensation UVLO (on) 16V/15V A built-in slope compensation circuit is constructed UVLO (off) 10V/ 9V in GR8835A. When the switch is on, a ramp voltage is added to the sensed voltage across the CS pin, which helps to stabilize the system and prevent sub-harmonic oscillations. Fig.13 Soft Start Over-load Protection (OLP) During initial power on, the GR8835A provides soft The controller has over load protection function. start function. It effectively suppresses the start up An internal circuit detects the load level, when the peak current to reduce the power MOSFET drain load is larger than a threshold and the condition voltage especially at high line. lasts more than 60ms, the gate output will keep low level. Oscillator The maximum duty-cycle of internal oscillator is limited about 75% saturation. to avoid the transformer Then VCC decreases below UVLO off level, the controller resets again. Fig.14 shows the waveform of the OLP operation. The frequency of the oscillator is decided by an external resistor connected from RT pin to ground. Fosc= 6500KHz/R (Kohm) Where R is the resistor connected at RT pin. A 100Kohm resistor results in 65KHz switching frequency. The recommended range of oscillation frequency is 50 KHz~130 KHz. 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 7 GR8835A Gate Clamp/Soft Driving Driver is clamped by an internal 18V Zener diode. Those damages usually come from undesired over-voltage gate signals. Under the conditions listed below, the gate output will turn off immediately to protect the power circuit. The GR8835A also has soft driving function to minimize EMI. Fault Protection There are several critical protection integrated in the . CS pin floating . RT pin floating OVP (Over Voltage Protection) on VCC . RT pin short to ground To prevent power MOSFET from being damaged, the GR8835A is implemented an OVP function on VCC. When the VCC voltage is higher than the OVP threshold voltage, the output gate driver circuit will be shut down immediately to stop the switching of power MOSFET. The VCC OVP function is an auto-recovery type protection. If OVP happens, the pulses will be stopped and recover at the next UVLO on. The GR8835A is working in a hiccup mode. 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 8 GR8835A Typical Application Circuit 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 9 GR8835A Bom List No. Part.No Description 1 C1 2 Note No. Part.No Description X-CAP/0.22uF 27 R2 SMD1206 / 105 C2 E-CAP 400V/33uF 28 R3 SMD1206 / 754 3 C3 102/1KV 29 R4 SMD1206 / 754 4 C4 E-CAP 50V/10uF 30 R5 SMD1206 /393 5 C5 Y-CAP CD222 31 R6 SMD1206 / 683 6 C6 SMD0805, 200V/222 32 R7 SMD0805 / 103 7 C7 E-CAP 25V/330uF 33 R8 SMD0805 / 10R 8 C8 E-CAP 25V/330uF 34 R9 SMD0805 / 68R 9 C9 E-CAP 25V/100uF 35 R10 SMD0805 / 1003 1% 10 C10 SMD0805,103 36 R11 SMD1206 / 2.7R 5% 11 C11 N.A. 37 R12 SMD1206 / 2.7R 5% 12 CR1 HER108 38 R13 SMD1206 / 3.9R 5% 13 CR2 HER108 39 R14 SMD1206 /22R 14 CR3 HER108 40 R15 SMD1206 /22R 15 CR4 HER108 41 R16 SMD0805 / 102 16 CR5 FR107 42 R17 N.A. 17 CR6 FR104 43 R18 SMD0805 / 393 18 CR7 SB5100 44 R19 SMD0805 / 153 1% 19 CR8 N.A. 45 R20 SMD0805 / 392 1% 20 F1 250V/1.5A 46 R21 N.A. 21 HS1 Heat Sink 47 T1 EE25 22 L1 GRT160905F403-N 40mH 48 TVR1 07471 23 L2 GR0315-1R6M-N 1.6uH 49 U1 GR8835/35A 24 NTC1 2.5Ω 50 U2 PC123 25 Q1 KHB4D5N60F 51 U3 GL431 26 R1 SMD1206 / 105 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com Note 1.4mH SOT-26 10 GR8835A Package Information SOT-26 SYMBOL MILLIMETERS MIN. INCHES MAX. A MIN. MAX. 1.45 0.057 A1 0.00 0.15 0.000 0.006 A2 0.90 1.30 0.035 0.051 b 0.30 0.50 0.012 0.020 c 0.08 0.22 0.003 0.009 D 2.70 3.10 0.106 0.122 E 2.60 3.00 0.102 0.118 E1 1.40 1.80 0.055 0.071 e 0.95 BSC e1 L θ 0.037 BSC 1.90 BSC 0.30 o 0 0.075 BSC 0.60 8 o 0.012 o 0 0.024 8 o Note : 1. Followed from JEDEC TO-178 AB. 2. Dimension D and E1 do not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed 10 mil per side. 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 11 GR8835A Package Information DIP-8 SYMBOL MILLIMETERS MIN. INCHES MAX. A MIN. MAX. 5.33 0.210 A1 0.38 0.015 A2 2.92 4.95 0.115 0.195 b 0.36 0.56 0.014 0.022 b2 1.14 1.78 0.045 0.070 c 0.20 0.35 0.008 0.014 D 9.01 10.16 0.355 0.400 D1 0.13 E 7.62 8.26 0.300 0.325 E1 6.10 7.11 0.240 0.280 0.005 e 2.54 BSC 0.100 BSC eA 7.62 BSC 0.300 BSC eB L 10.92 2.92 3.81 0.430 0.115 0.150 Note : 1. Followed from JEDEC MS-001 BA 2. Dimension D, D1 and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 10 mil. 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 12 GR8835A Carrier Tape & Reel Dimensions SOT-26 Application A H 178.0±2.00 50 MIN. P0 P1 P2 D0 D1 4.0±0.10 4.0±0.10 2.0±0.05 1.5+0.10 -0.00 1.0 MIN. SOT-26 T1 C d 8.4+2.00 13.0+0.50 -0.00 -0.20 D 1.5 MIN. W E1 20.2 MIN. 8.0±0.30 1.75±0.10 T A0 B0 F 3.5±0.05 K0 0.6+0.00 3.20±0.20 3.10±0.20 1.50±0.20 -0.40 (mm) Application SOT -26 Carrier Width Cover Tape Width Devices Per Reel 8 5.3 3000 ________________________________________________________________________ Grenergy OPTO, Inc. reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. 2010.04 Ver 1.41 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com 13