ISL6845 Intersil Corporation, ISL6845 Datasheet
ISL6845
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ISL6845 Summary of contents
Page 1
... Improved Industry Standard Single-Ended Current Mode PWM Controller The ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 family of adjustable frequency, low power, pulse width modulating (PWM) current mode controllers is designed for a wide range of power conversion applications including boost, flyback, and isolated output configurations. ...
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... ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Ordering Information TEMP. PART PART RANGE NUMBER MARKING (°C) ISL6840IB* ISL 6840IB -40 to +105 8 Ld SOIC ISL6840IBZ* 6840 IBZ -40 to +105 8 Ld SOIC (See Note) ISL6840IU* 6840 -40 to +105 8 Ld MSOP M8.118 ISL6840IUZ* 6840Z -40 to +105 8 Ld MSOP ...
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Functional Block Diagram VDD UVLO COMPARATOR + - + BG - GND A 2 0.5 CS ERROR AMPLIFIER + - FB COMP VREF 2.6V 0.7V OSCILLATOR COMPARATOR - RTCT + CLOCK 8.4mA ON V REF 5.00 V ...
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Typical Application - 48V Input Dual Output Flyback VIN+ R1 36V TO 75V C1 VIN VR1 CR2 C5 CR6 R22 R27 U4 R26 COMP CS FB RTCT ISL684x R10 CR1 C8 CR5 ...
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Typical Application - Boost Converter L1 VIN+ C1 VIN- R8 C10 CR1 VREF COMP VDD FB CS OUT C4 RTCT GND R3 C7 +VOUT + C2 C3 RETURN VIN ...
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... ISL684xIx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +105°C Supply Voltage Range (Typical, Note 3) ISL6840, ISL6841 7.5V to 14V ISL6843, ISL6845 16V ISL6842, ISL6844 15V to 18V CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. +150° ...
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... ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to Block Diagram and Typical Application schematic on page 3 and page 4. V Typical values are at T PARAMETER CURRENT SENSE Input Bias Current CS Offset Voltage COMP to PWM Comparator Offset Voltage Input Signal, Maximum = Δ ...
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... ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Typical Performance Curves 1.02 1.01 1.00 0.99 0.98 0.97 -40 - TEMPERATURE (°C) FIGURE 1. FREQUENCY vs TEMPERATURE 1.002 1.000 0.998 0.996 0.994 -40 -25 - TEMPERATURE (°C) FIGURE 3. EA REFERENCE vs TEMPERATURE Pin Descriptions RTCT - This is the oscillator timing control pin. The operational frequency and maximum duty cycle are set by connecting a resistor, RT, between VREF and this pin and a timing capacitor, CT, from this pin to GND ...
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... ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 average output current. Knowing the operating frequency, f, and the MOSFET gate charge, Qg, the average output current can be calculated in Equation 5: × OUT To optimize noise immunity, bypass V ceramic capacitor as close to the VDD and GND pins as possible. ...
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... ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Small Outline Plastic Packages (SOIC) N INDEX 0.25(0.010) H AREA E - SEATING PLANE - -C- α 0.10(0.004) 0.25(0.010 NOTES: 1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of Publication Number 95. ...
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... ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Mini Small Outline Plastic Packages (MSOP -B- INDEX 0.20 (0.008 AREA TOP VIEW 0.25 (0.010) GAUGE PLANE SEATING PLANE - 0.10 (0.004) b -H- - 0.20 (0.008) SIDE VIEW 0.20 (0.008) NOTES: 1. These package dimensions are within allowable dimensions of JEDEC MO-187BA ...
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... ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845 Dual Flat No-Lead Plastic Package (DFN INDEX AREA TOP VIEW C SIDE VIEW A3 SEATING PLANE D2 7 (DATUM B) D2 INDEX AREA (DATUM N (Nd-1)Xe REF. BOTTOM VIEW (A1) NX (b) 5 SECTION "C-C" ...