SL71053 AUK | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 6

Technical content

Features

  • Constant voltage & constant current control
  • Wide operating voltage range (2.2V to 14V)
  • Precision internal voltage reference (1.21V ±1.0%)
  • Precision internal CC AMP reference (80mV Typ.)
  • Low external component count
  • Current sink output stage
  • Easy compensation

Applications

  • Adapters
  • Battery chargers

Ordering Information

Type NO. Marking Package Code SL71053 703 SOT - 26 SSeemmiiccoonndduuccttoorr

Typical Application : Adapter or Battery Charger Application Using SL71053 In the above application schematic, the SL71053 is used on the secondary side of a flyback adapter (or battery charger) to provide an accurate control of voltage and current. The above feedback loop is made with an optocoupler. Internal Block Outline Dimensions unit : mm 3 4 1 6 2 5

Name Pin No. Type Function Vctrl 1 Analog Input Input Pin of the Voltage Control Loop Gnd 2 Power Supply Ground Line. 0V Reference For All Voltages Out 3 Current Sink Output Out put Pin. Sinking Current Only Ictrl 4 Analog Input Input Pin of the Current Control Loop Vsense 5 Analog Input Input Pi n of the Current Control Loop VCC 6 Power Supply DC Supply Line Absolute Maximum Ratings Characteristic Symbol Value Unit DC Supply Voltage Vcc 14 V Power Dissipation Pd * 500 ㎽ Operating Ambient Temperature Range Topr 0 to 85 ℃ Storage Temperature Range Tstg -55 to 150 ℃ * Mount on a glass epoxy circuit board of 30x30mm Pad dimension of 50mm2 Operating Conditions Characteristic Symbol Value Unit DC Supply Voltage V CC 2.2 ~ 14V V

Electrical Characteristics

Ta = 25℃ and VCC = 5V (unless otherwise specified) Characteristic Symbol Test Condition Min. Typ. Max. Unit [Total Current Consumption] Ta = 25℃ - 1.2 2 Total Supply Current – not taking the output sinking current into account ICC

Ta = 25℃ and VCC = 5V (unless otherwise specified) Characteristic Symbol Test Condition Min. Typ. Max. Unit [Voltage Control Loop] Ta = 25℃ 1 3.5 - Transconduction Gain (Vctrl). Sink Current Only 1) Gmv ㎃/㎷ Ta = 25℃ 1.198 1.210 1.222Voltage Control Loop Reference 2) Vref 0 < Ta < 85℃ 1.186 1.210 1.234 V Ta = 25℃ - 50 - Input Bias Current (Vctrl) libv 0 < Ta < 85℃ - 100 - [Current Control Loop] Ta = 25℃ 1.5 7.0 - Transconduction Gain (lctrl). sink Current Only 3) Gmi 0 < Ta < 85℃ - - - ㎃/㎷ Iout = 2.5 ㎃, Ta = 25℃ 77 80 83 Current Control Loop Reference 4) Vsense 0 < Ta < 85℃ 75 - 85 Ta = 25℃ - 25 - Current out of pin ICTRL at -200mV Iibi [Output Stage] Low output Voltage at 10mA Sinking current Vol - - 200 - ㎷ Output Short Circuit Current. Output to VCC. Sink Current Only Ios - - 35 70 ㎃ 1) If the voltage on VCTRL (the negative input of the amplifier) is higher than the positive amplifier input (Vref = 1.210V), and it is increased by 1mV, the sinking current at the output OUT will be increased by 3.5mA. 2) The internal voltage reference is set at 1.210V (bandgap reference). The voltage control loop precision takes into account the cumulative effects of the internal voltage reference deviation as well as the input offset voltage of the trans-conductance operational amplifier. The internal voltage reference is fixed by bandgap, and trimmed to 0.5% accuracy at room temperature. 3) When the positive input at ICTRL is lower than -80mV, and the voltage is decreased by 1mV, the sinking current at the output OUT will be increased by 7mA. 4) The internal current sense threshold is set to -80mV. The current control loop precision takes into account the cumulative effects of the internal voltage reference deviation as well as the input offset voltage of the trans- conduction operational amplifier.

0.0 0.3 0.6 0.9 1.2 1.5 0 1 53 04 56 07 59 0 Ta[℃] Icc[mA] Vcc:2.2VVcc:5.0V Vcc:12V Vref vs Ta 1.198 1.202 1.206 1.21 1.214 1.218 1.222 0 1 53 04 56 07 59 0 Ta[℃] Vref[V] 2.2V ≤ Vcc ≤ 12V Vsense vs Ta 0 1 53 04 56 07 59 0 Ta[℃] Vsense[mV] Vcc:2.2V Vcc:5.0V Vcc:12V Iibi v s Ta 0 1 53 04 56 07 59 0 Ta[℃] Iibi[uA] 2.2V ≤ Vcc ≤ 12V Ios v s Ta 0 1 53 04 56 07 59 0 Ta[℃] Ios[mA] Vcc:2.2V Vcc:5.0VVcc:12V Iibv v s Ta 100 0 1 53 04 56 07 59 0 Ta[℃] Iibv[nA] Vcc:2.2VVcc:5.0V Vcc:12V Electrical Characteristic Curves Fig.1 Supply current vs Ambient Temperature Fig.2 Vref vs Ambient Temperature Fig.6 Output Short circuit current vs Ambient Temperature Fig.4 Vsense pin input bias current vs Ambient Temperature Fig.5 Ictrl pin input bias current vs Ambient Temperature Fig.3 Vsense vs Ambient Temperature

The AUK Corp. products are intended for the use as components in general electronic equipment (Office and co mmunication equipment, m easuring equipment, home appliance, etc.). Please make sure that you consult with us before you use these AUK Corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to th e welfare of human life(atomi c energy control, airplane, spaceship, transportation, co mbustion control, all types of safety device, etc.). AUK Corp. cannot accept liability to any damage which may occur in case these AUK Corp. products were used in the mentioned equi pments without prior consultation with AUK Corp.. Specifications mentioned in this publication are subject to change without notice.