ISL9491AERZ-T Intersil, ISL9491AERZ-T Datasheet
ISL9491AERZ-T
Specifications of ISL9491AERZ-T
Related parts for ISL9491AERZ-T
ISL9491AERZ-T Summary of contents
Page 1
... MARKING (°C) ISL9491ERZ* 94 91ERZ - QFN ISL9491AERZ* 94 91AERZ - QFN *Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach ...
Page 2
Functional Pin Description SYMBOL VSW Input of the linear post-regulator. PGND Dedicated ground for the output gate driver of respective PWM. CS Current sense input; connect the sense resistor R FET. SGND Small signal ground for the IC. TCAP Capacitor ...
Page 3
Block Diagram OVERCURRENT COUNTER PROTECTION LOGIC SCHEME 1 GATE 4 PGND 3 ILIM1 CS AMP CS 2 VSW 14 VOUT 6 VSENSE 7 ON CHIP VCC 1 LDO UVLO SGND POR 8 SOFT-START 5 3 ISL9491, ISL9491A 9 10 OLF ...
Page 4
Typical Application Schematic QFN C36 + 2 56µ 10µH + C35 C31 1 100µF 10µF D9 B230A 0 0 R18 18Ω TPC6002 Q1 R17 470Ω R16 0.100Ω NOTES: 1. The output voltage level for the desired polarization reception ...
Page 5
... QFN Package (Notes Maximum Junction Temperature (Note +150°C Maximum Storage Temperature Range . . . -40°C to +150°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Recommended Operating Conditions Temperature -20°C to +85°C = 12V -20°C to +85°C, unless otherwise noted. Typical values are at ...
Page 6
Electrical Specifications V T PARAMETER Dynamic Overload Protection Off-Time Dynamic Overload Protection On-Time TCAP Charging Current TCAP Discharging Current LINEAR REGULATOR Drop-out Voltage Output Backward Leakage Current Output Undervoltage (After Initial Power-up ) Output Overvoltage (After Initial Power-up) EN, VSET, ...
Page 7
Electrical Specifications V T PARAMETER OSCILLATOR Oscillator Frequency Thermal Shutdown Temperature Shutdown Threshold Temperature Shutdown Hysteresis 5. VSET, EXTM, EN pins have 200kΩ internal pull-down resistors the Dynamic current limit mode, the output is ON for 50ms and ...
Page 8
Typical Performance Curves FIGURE 4. VLNB RISE TIME WITH TCAP = 0.22µF is 13ms FIGURE 6. BOOST SWITCH NODE AT 0A (DISCONTINUOUS) FIGURE 8. BOOST SWITCH NODE AT 300mA (CONTINUOUS MODE) 8 ISL9491, ISL9491A (Continued) FIGURE 5. VLNB RISE TIME ...
Page 9
Typical Performance Curves FIGURE 10. VLNB TRANSITIONS FROM 18.3V TO 13.3V FIGURE 12. 22kHz TONE ON 13.3V LOAD LOAD CURRENT VLNB FIGURE 14. VLNB CONNECTED TO 350mA LOAD WITH R = 148k ILIM 9 ISL9491, ISL9491A (Continued) FIGURE 11. 22kHz ...
Page 10
Typical Performance Curves OUTPUT CURRENT OUTPUT VOLTAGE FIGURE 16. OUTPUT CURRENT AND VOLTAGE WITH OUTPUT SHORTED TO GND, R FIGURE 18. THE ISL9491 IN THERMAL EQUILIBRIUM WITH ISL9491, ISL9491A (Continued) FIGURE 17. THE ISL9491 ENTERING THERMAL = ...
Page 11
... GND for a period of 50ms, the device enters 50ms/t ON limiting is also called “Dynamic Current Limiting”, which is used extensively on other Intersil LNB controllers. A symmetrically LNB linear overcurrent will drive the FAULT pin low during the t = 900ms period. This operation continues until the OFF fault is removed ...
Page 12
... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries ...
Page 13
Package Outline Drawing L16.4x4 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 6, 02/08 4.00 6 PIN 1 INDEX AREA 0.15 (4X) TOP VIEW ( TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 13 ...