AP1212 ANACHIP | Alldatasheet
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Dual USB High-Side Power Switch This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. 1.0 Sep.23, 2004 Features - Compliant to USB specifications - Dual independent switches control - 2.7V to 5.5V input voltage - 500mA minimum continuous current per port - 110mΩ typical on-resistance - 1.25A maximum short circuit current limit - Independent open-drain fault flag pins - 110μA typical on-state supply current - 1μA typical off-state supply current - Output can be forced higher than input (off-state) - Thermal shutdown - 2.4V typical under voltage lockout (UVLO) - 1ms turn-on (soft-start) and fast turn-off - Enable active-high (H) or active-low (L) - 8-pin SOP and PDIP packages Applications
- USB hubs
- Hot plug-in power supplies
- Battery-charger circuits General Description The AP1212 series are dual integrated high-side power switch with independent enable and flag functions, optimized for self-powered and bus-powered Universal Serial Bus (USB) applications. The AP1212 series support the following USB requirements: each switch channel supplies up to 500mA as required by USB downstream devices; the switch’s low on-resistance meets USB voltage drop requirements; fault current is limited to typically 1000mA, well below the UL 25VA safety requirements; and a flag output is available to indicate faul t conditions to the local USB controller. Soft start eliminates the momentary voltage drop on the upstream port that may occur when the switch is enabled in bus-powered applications. Additional features include thermal shutdown to prevent catastrophic switch failure from high-current loads, under voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present, and 3.3V and 5V logic compatible enable inputs. Pin Assignments EN1 EN2 FLG1 FLG2
5 OUT2
(Top View) Pin Descriptions Name Description EN1 EN2 Enable: Logic-compatible enable input. ( H: active high, L: active low). Do not float. FLG1 FLG2 Fault Flag: Active-low, open-drain output. Indicates over current, UVLO, and thermal shutdown. GND Supply return. IN Supply Input: Output MOSFET drain. Also supplies IC’s internal circuitry. Connect to positive supply. OUT1 OUT2 Switch Output: Output MOSFET source. Typically connect to switched side of load.
Dual USB High-Side Power Switch Anachip Corp. Ordering Information AP 12 1X X X X Power Switch Enable Packing Blank : Tube A: Taping Package H: Active-High L: Active-Low S:SOP-8 N:PDIP-8L Lead Free Blank : Normal L : Lead Free Package Block Diagram Charge Pump Thermal Shutdown Charge Pump Driver Current Limit UVLO Current Limit Driver CS CS OUT1 IN OUT2 FLG1 EN1 EN2 FLG2 Power N-MOSFET Power N-MOSFET Absolute Maximum Ratings (Note 1) Symbol Parameter Rating Unit VIN Supply Voltage +7 V VFLG Fault Flag Voltage +7 V IFLG Fault Flag Current 50 mA VOUT Output Voltage +7 V VEN Control Input Range –0.3 to V IN +2 V TST Storage Temperature -65 to +150 oC TLEAD Lead Temperature 260 oC ESD Rating Note 3 4 KV
Dual USB High-Side Power Switch Anachip Corp. Operating Ratings (Note 2) Symbol Parameter Rating Unit VIN Supply Voltage +2.7 to +5.5 V TA Ambient Operating Temperature -40 to +85 oC ΘJA Thermal Resistance SOP 120 oC/W ΘJA Thermal Resistance PDIP 100 oC/W Electrical Characteristics (Under the conditions of VIN=+5V and TA=25oC, unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. Unit switch off, OUT = open (Note 4) 0.50 5 µA ICC Supply Current all switches on, OUT = open (Note 4) 110 160 µA VIT Enable Input Threshold (Note 4) 0.8 1.7 2.40 V IEN Enable Input Current V EN =0V to 5.5V -1 ±0.01 1 µA CEN Enable Input Capacitance 1 pF RDS(ON) Switch Resistance VIN =2.7V ~ 5.5V, IOUT =500mA, each switch 110 140 mΩ TOND Output Turn-On Delay RL =10Ω each output 30 µS TR Output Turn-On Rise Time RL =10Ω each output 1 mS TOFFD Output Turnoff Delay RL =10Ω each output 0.5 10 µS TF Output Turnoff Fall Time RL =10Ω each output 0.5 10 µS ILEAK Output Leakage Current each output (output disabled) 10 µA IOUT Continuous Load Current each output 0.6 A IOS Short-circuit Current Limit Each output (enable into load), VOUT=0V 0.8 1.0 1.25 A ILIM Current-Limit Threshold Ramped load applied to enabled output 1.0 1.2 1.4 A TJ increasing 140 oC TTS Over-temperature Shutdown Threshold TJ decreasing 130 oC VIN = 5V, IL = 10mA 10 25 Ω RFO Error Flag Output Resistance VIN = 3.3V, IL = 10mA 15 40 Ω IFOH Error Flag Off Current V FLAG = 5V 0.01 1 µA VIN = increasing 2.5 V UVLO UVLO Threshold VIN = decreasing 2.3 V Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating.
Dual USB High-Side Power Switch Anachip Corp. Typical Performance Characteristics 100 104 108 112 116 120 RL=10Ω T=25 O C On-Resistance vs. Supply Voltage ON-RESISTANCE (mΩ) SUPPLY VOLTAGE (V) -40 -20 0 20 40 60 80 100 100 110 120 130 140 150 160 VSUPPLY=3.3V VSUPPLY=5V RL=10Ω On-Resistance vs. Temperature ON-RESISTANCE (mΩ) TEMPERATURE ( O 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 CL=47µ F RL=10Ω O C O C -40 O C Turn-On Rise Time vs. Supply Voltage RISE TIME (mS) SUPPLY VOLTAGE (V) - 4 0 - 2 00 2 04 06 08 0 1 0 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 RL=10Ω CL=47µ F VSUPPLY=3.3V VSUPPLY=5V Turn-On Rise Time vs. Temperature RISE TIME (mS) TEMPERATURE ( O 100 120 140 160 180 200 220 O C O C -40 O C On-Current vs. Supply Voltage CURRENT (µ A) SUPPLY VOLTAGE (V) - 4 0 - 2 00 2 04 06 08 0 1 0 0 100 120 140 160 180 200 VSUPPLY=3.3V VSUPPLY=5V On-Current vs. Temperature CURRENT (µ A) TEMPERATURE ( O
Dual USB High-Side Power Switch Anachip Corp. Typical Performance Characteristics (Continued) -50 100 150 200 250 300 350 O C O C -40 O C Off-Current vs. Supply Voltage CURRENT (nA) SUPPLY VOLTAGE (V) -40 -20 0 20 40 60 80 100 -50 100 150 200 250 300 350 VSUPPLY=3.3V VSUPPLY=5V Off-Current vs. Temperature CURRENT (nA) TEMPERATURE ( O 1.0 1.2 1.4 1.6 1.8 2.0 VEN FALLING VEN RISING T=25 O C Enable Threshold vs. Supply Voltage ENABLE THRESHOLD (V) SUPPLY VOLTAGE (V) -40 -20 0 20 40 60 80 100 1.0 1.2 1.4 1.6 1.8 2.0 VIN=5V VEN FALLING VEN RISING Enable Threshold vs. Temperature ENABLE THRESHOLD (V) TEMPERATURE ( O 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 O C O C -40 O C Short-Circuit Current-Limit vs. Supply Voltage CURRENT-LIMIT (A) SUPPLY VOLTAGE (V) - 4 0 - 2 00 2 04 06 08 0 1 0 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 VSUPPLY=3.3V VSUPPLY=5V Short-Circuit Current-Limit vs. Temperature CURRENT-LIMIT (A) TEMPERATURE ( O
Dual USB High-Side Power Switch Anachip Corp. Typical Performance Characteristics (Continued) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 O C O C -40 O C Current-Limit Threshold vs. Supply Voltage CURRENT-LIMIT THRESHOLD (A) SUPPLY VOLTAGE (V) - 4 0 - 2 00 2 04 06 08 0 1 0 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 VSUPPLY=3.3V VSUPPLY=5V Current-Limit Threshold vs. Temperature CURRENT-LIMIT (A) TEMPERATURE ( O -40 -20 0 20 40 60 80 100 0.0 0.5 1.0 1.5 2.0 2.5 3.0 VIN FALLING VIN RISING UVLO Threshold vs. Temperature UVLO THRESHOLD (V) TEMPERATURE ( O
Dual USB High-Side Power Switch Anachip Corp. Functional Characteristics Turn-On/Turn-Off (AP1212H) Turn-On (AP1212H) TIME (10mS/div.) TIME (200µS/div.) Turn-Off (AP1212H) Enabled Into Short (AP1212H) TIME (2mS/div.) TIME (500µS/div.) Current-Limit Response (AP1212H) Current-Limit Response (AP1212H) TIME (50mS/div.) TIME (20µS/div.) IOUT VEN VFLG VOUT IOUT VIN=5V CL=47µF RL=35Ω Inrush Current 140 mA Inrush Current VEN VFLG VOUT VIN=5V CL=47µF RL=35Ω Output Turn-On Rise Time 140 mA 140 mA VIN=5V CL=47µF RL=35Ω VEN VFLG VOUT IOUT VIN=5V Short-Circuit Current VEN VFLG VOUT IOUT Hysteresis (10OC) VIN=5V CL=47µF Current-Limit Threshold Short-Circuit Current Thermal Shutdown VEN VFLG VOUT IOUT VIN=5V CL=47µF Current-Limit Threshold Short-Circuit Current VEN VFLG VOUT IOUT
Dual USB High-Side Power Switch Anachip Corp. Typical Application Circuit USB Control 3.3V 5V Power Supply 0.1uF IN FLG1 EN1 FLG2 EN2 OUT1 OUT2 GND 0.1uF 33uF 33uF0.1uF GND VBUS GND VBUS Downstream USB Ports AP1212 feerite bead feerite bead feerite bead feerite bead Test Circuit EN1 FLG1 FLG2 EN2 OUT1 IN GND OUT2 ON OFF ON OFF 10K R2 10K R1 VCC +5V 10Ω R3 10Ω R4 0.1uF AP1212
Dual USB High-Side Power Switch Anachip Corp. Function Description Error Flag An open-drained output of N-channel MOSFET, the FLG output is pulled low to signal the following fault conditions: input undervoltage, output current limit, and thermal shutdown. Current Limit The current limit threshold is preset internally. It protects the output MOSFET switches from damage due to undesirable short circuit conditions or excess inrush current often encountered during hot plug-in. The low limit of the current limit threshold of the AP1212 allows a minimum current of 0.5A through the MOSFET switches. A current limit condition will signal the error flag. Thermal Shutdown When the chip temperature exceeds 140ºC for any reason other than overcurrent fault of either one of the two MOSFET switches, the thermal shutdown function turns off both MOSFET switches and signal the error flag. A hysteresis of 10ºC prevents the MOSFETs from turning back on until the chip temperature drops to below 130ºC. Supply Filtering A 0.1µF to 1µF bypass capacitor from IN to GND, located near the device, is strongly recommended to control supply transients. Without a bypass capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry. Transient Droop Requirements USB support dynamic attachment (hot plug-in) of peripherals. A current surge is caused by the input capacitance of downstream device. Ferrite beads are recommended in series with all power and ground connector pins. Ferrite beads reduce EMI and limit the inrush current during hot-attachment by filtering high-frequency signals. Short Circuit Transient Bulk capacitance provides the short-term transient current needed during a hot-attachment event. With a 33µF, 16V tantalum or 100µF, 10V electrolytic capacitor mounted close to downstream connector per port should provide transient drop protection. Printed Circuit Layout The power circuitry of USB printed circuit boards requires a customized layout to maximize thermal dissipation and to minimize voltage drop and EMI. Marking Information Part Number 1 4 PDIP/SOP Logo Enable Type H: Active High L: Active Low ID code: internal Year: "01" =2001 "02" =2002 Xth week: 01~52 8 5 AP1212 X YY WW X X (Top View) Blank: normal L: Lead Free Package
Dual USB High-Side Power Switch Anachip Corp. Package Information (1) Package Type: PDIP-8L D 7 (4X) AL A2A1 B2B1 B eS 15 (4X) E C eB E-PIN O0.118 inch PIN #1 INDENT O0.025 DEEP 0.006-0.008 inch
Dual USB High-Side Power Switch Anachip Corp. Package Information (Continued) (2) Package Type: SOP-8L VIEW "A" L C VIEW "A" H E A A2A1Be D 7 (4X) 0.015x45 7 (4X) y A1 0.10 - 0.25 0.040 - 0.100 θ 0O - 8 O 0 O - 8 O