PT8A3270/1/2/3/4/5/6/7 Heating Controller
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- Laurel Harrison
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1 Features Dual Voltage (120V/240V) operations Auto temperature control with NTC NTC open protection Multi mode LED indicator Proportional control Pulse trigger for high current SCR Internal Zener Auto Heating off after heating timer timeout Low cost 8-Pin DIP and SOIC package Applications Curler Straightener Description The PT8A3270/1/2/3/4/5/6/7 is a mixed signal CMOS LSI chip designed as heating controller with help of external NTC (Negative Temperature Component). NTC open protection is implemented for device safety. This device can be used in both 120V and 240V power line supplier, as it will automatically adjust the heating power according to the power line voltage to avoid heating appliance damage or long heating time. The proportional control algorithm is designed in this product. Pin Configuration PT8A3270/1/2/3 PT8A3274/5/6/7 P PT8A3290/1/2/3 PT8A3294/5/6/7 P NTC1 1 8 VDD NTC1 1 8 VDD NTC1 NTC2 2 7 OFF NTC2 2 7 LED2 NTC2 CLK 3 6 GATE CLK 3 6 GATE CLK 4 5 ON 4 5 ON/OFF Pin Description Pin No. Pin Name 3270/1/2/3 3274/5/6/7 I/O Description 1 NTC1 NTC1 I NTC voltage input, NTC open detection input 2 NTC2 NTC2 O Output signal for NTC open detection 3 CLK CLK I Clock input from power line 4 Power Ground and Power 5 ON ON_OFF I/O 3270/1/2/3: Heating-on button input. and LED1 driving output 3274/5/6/7: Heating-on/off button input and LED1 driving output 6 GATE GATE O 3270/1/2/3/4/5/6/7: SCR trigger output 7 OFF LED2 I/O 8 VDD VDD Power Ground and Power 3270/1/2/3: Heating-off button input and LED2 driving output 3274/5/6/7: LED2 driving output 1
2 Block Diagram NTC1 5bit Precise ADC ADC OFF/TURBO/LED2 OFF/LED2 NTC2 Controller GATE CLK ON/ON_OFF/LED1 Maximum Ratings Storage Temperature o C to +150 o C Supply Voltage to Ground Potential (Input & V CC Only) V to + 5.5V Supply Voltage to Ground Potential (Outputs) V to + 5.5V DC Input Voltage V to + 5.5V DC Output Current... 20mA Power Dissipation mW Recommended operation conditions Symbol Pin Parameter Min Typ Max Unit Frequency CLK Input CLK Frequency - 50/60 - Hz T A - Operating temperature AC Electrical Characteristics (V DD = 3.5 ~ 5.5V, T A = -20 ~ 85ºC, unless otherwise noted) Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Symbol Description Test Conditions Min Type Max Unit F CLK Frequency of CLK /60 - Hz T GATE Width of trigger pulse S Timer Power off timer F CLK = 50Hz Hour 2
3 DC Electrical Characteristics (V DD = 3.5 ~ 5.5V, T A = -20 ~ 85ºC, unless otherwise noted) Symbol Description Test Conditions Min Type Max Unit PIN: CLK V IN = V DD A I IH I IL Input high current Input low current PIN: NTC1 V IN = V DD na PIN: NTC2 PIN: CLK V IN = V DD,Output High impedance na V IN = A V IN = 0.35V A PIN: NTC1 V IN = na PIN: NTC2 I OH Output High current PIN: GATE I OL PIN: NTC2 Output Low current PIN: GATE V IN =, Output High impedance V DD =4.5V Vout = 2.5V V DD =4.5V Vout =0.5V V DD =4.5V Vout =0.5V na ma ma ma V POR Voltage of POR V V Z Voltage of Zener I DD = 500uA ~ 10mA V I DD Current consumption NTC1,CLK pin tied to ground V DD = 4.5V A 3
4 Application Circuit PT8A3270/1/2/3 Application Circuit L Heater 43k(2W) NTC 47u RA 1M 10k RB PT8A3270/1/2/3 NTC1 VDD NTC2 OFF CLK GATE LED2 20k 100 OFF SCR 8.2k 10n ON 20k LED1 ON N PT8A3274/5/6/7 Application circuit L Heater 43k(2W) NTC 47u RA 1M 10k RB PT8A3274/5/6/7 NTC1 VDD NTC2 LED2 OFF CLK GATE LED2 100 SCR 8.2k 10n ON_OFF 20k LED1 ON/OFF N 4
5 Functional Description State description Reset The device will be of reset state after power-on. Heating on The device will be of heating on state after heating-on button is on Heating off This device enter heating-off state after its power-on reset or heating timer timeout, and all pins will be the same status as after power-on reset. NTC open protection When NTC is open, NTC1 pin will be pulled low in the period of NTC open detected. Timer Once IC enters Heating-on State, internal timer starts to count. When time is out after clock period, it will exit heating-on state. That is, in case of 60Hz CLK signal, the heating time is about 1 hour; and 1.2 hour for 50Hz. In heating-on state, temperature is regulated to the selected temperature by the IC through NTC close control loop. Control signal output When working in Heating-on state, Gate/LED output will be related to NTC1 input and CLK input amplitude. Effect of NTC and VT CLK (Level 2) on GATE and LED indication Workin g State CLK input voltage NTC (NTC open detection) NTC (Normal temp detection) GATE (trigger to SCR/TRIAC) LED LED1 LED2 LED1 LED2 3270/2/4/6 3270/2/4/6 3271/3/5/7 3271/3/5/7 0 ~ V ADC_BIT15 Flash1* On Off Proportional High for V ADC_BIT14 ~ output On On On level 2 V ADC_BIT1 (240V) V ADC_BIT1 ~ 0 On On On V DD ON V NTCO~ 0 ~ V ADC_BIT15 Flash1 Invert of On Off V DD Proportional Low for V ADC_BIT14 ~ LED1 output On On On level 2 V ADC_BIT1 (120V) V ADC_BIT1 ~ 0 On On On V DD Off X* X 0 Off Off Off X X 0~V NTCO X 0 Flash2* Flash2* Off * 1) X means any input. 2) Flash1 frequency is 1/32 clock. 3) Flash2 frequency is 1/8 clock 5
6 Mechanical Information PE (DIP-8) 1) Controlling dimensions in millimeters. 2) Ref: JEDEC MS-001D/BA Symbol Dimensions In Millimeters Min Max A A A B B BSC c D E E e BSC L E
7 WE (SOIC-8) 1) Controlling dimensions in millimeters. 2) Ref: JEDEC MS-012E/AA Symbol Dimensions In Millimeters Min Max A A A b c D E E e 1.27 BSC L θ 0 8 7
8 Ordering Information Part No. Package Code Package PT8A327xPE P Lead free 8-Pin DIP PT8A327xWE W Lead free and Green 8-Pin SOIC x shows 0~7 with different function see Function Comparison Table. E = Pb-free or Pb-free & Green Adding X Suffix= Tape/Reel Function Comparison Table Part number LED Timer Switch Driver PT8A3270 Flash Y Two Key (ON + OFF) SCR PT8A3271* Constant Y Two Key (ON + OFF) SCR PT8A3272* Flash N Two Key (ON + OFF) SCR PT8A3273* Constant N Two Key (ON + OFF) SCR PT8A3274 Flash Y One key (ON_OFF) SCR PT8A3275 Constant Y One key (ON_OFF) SCR PT8A3276* Flash N One key (ON_OFF) SCR PT8A3277* Constant N One key (ON_OFF) SCR *Contact Pericom for availability. Pericom Semiconductor Corporation Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom. 8
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LVPECL Fanout Buffer with 2 to 1 Differential Clock Input Mux Features ÎÎF MAX < 1.5GHz ÎÎ10 pairs of differential LVPECL outputs ÎÎLow additive jitter, < 0.03ps (typ) ÎÎSelectable differential input pairs
1:2 LVCMOS/LVTTL-to-LVCMOS/LVTTL Zero Delay Buffer for Audio
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Features ÎÎLow skew outputs (250 ps) ÎÎPackaged in 8-pin SOIC ÎÎLow power CMOS technology ÎÎOperating Voltages of 1.5 V to 3.3 V ÎÎOutput Enable pin tri-states outputs ÎÎ3.6 V tolerant input clock ÎÎIndustrial
DM74AS651 DM74AS652 Octal Bus Transceiver and Register
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Description. Applications
μp Supervisor Circuits Features Precision supply-voltage monitor - 4.63V (PT7A7511, 7521, 7531) - 4.38V (PT7A7512, 7522, 7532) - 3.08V (PT7A7513, 7523, 7533) - 2.93V (PT7A7514, 7524, 7534) - 2.63V (PT7A7515,
PI5C3384 PI5C3384C. 10-Bit, 2-Port Bus Switch
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MM74HC00 Quad 2-Input NAND Gate
Quad 2-Input NAND Gate General Description The MM74HC00 NAND gates utilize advanced silicon-gate CMOS technology to achieve operating speeds similar to LS-TTL gates with the low power consumption of standard
DM74ALS245A Octal 3-STATE Bus Transceiver
DM74ALS245A Octal 3-STATE Bus Transceiver General Description This advanced low power Schottky device contains 8 pairs of 3-STATE logic elements configured as octal bus transceivers. These circuits are
ICS LOW PHASE NOISE ZERO DELAY BUFFER AND MULTIPLIER. Description. Features. Block Diagram DATASHEET
DATASHEET ICS670-04 Description The ICS670-04 is a high speed, low phase noise, Zero Delay Buffer (ZDB) which integrates IDT s proprietary analog/digital Phase Locked Loop (PLL) techniques. It is identical
MK1413 MPEG AUDIO CLOCK SOURCE. Features. Description. Block Diagram DATASHEET
DATASHEET MK1413 Description The MK1413 is the ideal way to generate clocks for MPEG audio devices in computers. The device uses IDT s proprietary mixture of analog and digital Phase-Locked Loop (PLL)
PI6C V/3.3V, 500 MHz Twelve 2-to-1 Differential LVPECL Clock Multiplexer. Description. Features. Block Diagram.
LVPECL Clock Multiplexer Features Pin-to-pin compatible to ICS85352I F MAX 500 MHz Propagation Delay < 4ns Output-to-output skew < 100ps 12 pairs of differential LVPECL outputs Selectable differential
DM74ALS652 Octal 3-STATE Bus Transceiver and Register
DM74LS652 Octal 3-STTE us Transceiver and Register General Description This device incorporates an octal transceiver and an octal D-type register configured to enable transmission of data from bus to bus
Adaptive Power MOSFET Driver 1
Adaptive Power MOSFET Driver 1 FEATURES dv/dt and di/dt Control Undervoltage Protection Short-Circuit Protection t rr Shoot-Through Current Limiting Low Quiescent Current CMOS Compatible Inputs Compatible
PI3C V/3.3V, High Bandwidth, Hot Insertion 10-Bit, 2-Port, Bus Switch
2.5V/3., High Bandwidth, Hot Insertion Features Near-Zero propagation delay 5-ohm switches connect inputs to outputs High Bandwidth (>400 MHz) Permits Hot Insertion. Rail-to-Rail, 3. or 2.5V ing 5V I/O
ICS512 LOCO PLL CLOCK MULTIPLIER. Description. Features. Block Diagram DATASHEET
DATASHEET ICS512 Description The ICS512 is the most cost effective way to generate a high-quality, high frequency clock output and a reference clock from a lower frequency crystal or clock input. The name
ICS NETWORKING AND PCI CLOCK SOURCE. Description. Features. Block Diagram DATASHEET
DATASHEET Description The is a low cost frequency generator designed to support networking and PCI applications. Using analog/digital Phase Locked-Loop (PLL) techniques, the device uses a standard fundamental
74LVC273 Octal D-type flip-flop with reset; positive-edge trigger
INTEGRATED CIRCUITS Octal D-type flip-flop with reset; positive-edge trigger Supersedes data of 1996 Jun 06 IC24 Data Handbook 1998 May 20 FEATURES Wide supply voltage range of 1.2V to 3.6V Conforms to
ICS502 LOCO PLL CLOCK MULTIPLIER. Description. Features. Block Diagram DATASHEET
DATASHEET ICS502 Description The ICS502 LOCO TM is the most cost effective way to generate a high-quality, high-frequency clock output and a reference from a lower frequency crystal or clock input. The
Features. EXTERNAL PULLABLE CRYSTAL (external loop filter) FREQUENCY MULTIPLYING PLL 2
DATASHEET 3.3 VOLT COMMUNICATIONS CLOCK VCXO PLL MK2049-34A Description The MK2049-34A is a VCXO Phased Locked Loop (PLL) based clock synthesizer that accepts multiple input frequencies. With an 8 khz
Setup Period. General Description
General Description The MAX6443 MAX6452 low-current microprocessor reset circuits feature single or dual manual reset inputs with an extended setup period. Because of the extended setup period, short switch
PI5PD2068/ mΩ Current-Limited, Power-Distribution Switches
Features 7mΩ High-Side MOSFET 2.1A Continuous Current Thermal and Short-Circuit Protection Accurate Current Limit (2.85A typ.) Operating Range: 2.7V to 5.5V.6ms Typical Rise Time Under-Voltage Lockout
IDT5V60014 LOW PHASE NOISE ZERO DELAY BUFFER. Description. Features. Block Diagram DATASHEET
DATASHEET IDT5V60014 Description The IDT5V60014 is a high speed, high output drive, low phase noise Zero Delay Buffer (ZDB) which integrates IDT s proprietary analog/digital Phase Locked Loop (PLL) techniques.
PI6LC48P Output LVPECL Networking Clock Generator
Features ÎÎThree differential LVPECL output pairs ÎÎSelectable crystal oscillator interface or LVCMOS/LVTTL single-ended clock input ÎÎSupports the following output frequencies: 125MHz, 156.25MHz, 312.5MHz,
Micropower, Single-Supply, Rail-to-Rail, Precision Instrumentation Amplifiers MAX4194 MAX4197
General Description The is a variable-gain precision instrumentation amplifier that combines Rail-to-Rail single-supply operation, outstanding precision specifications, and a high gain bandwidth. This
Synchronous Buck Converter Controller
Product is End of Life 3/204 Synchronous Buck Converter Controller Si950 DESCRIPTION The Si950 synchronous buck regulator controller is ideally suited for high-efficiency step down converters in battery-powered