ISL6341C Intersil Corporation, ISL6341C Datasheet
ISL6341C
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ISL6341C Summary of contents
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... Traditional Dual Edge Modulator - Voltage-Mode PWM Control - Drives N-Channel MOSFETs • Fast Transient Response - High-Bandwidth Error Amplifier - 0% to 85% Max Duty Cycle for ISL6341, ISL6341C - 0% to 75% Max Duty Cycle for ISL6341A, ISL6341B • Lossless, Programmable Overcurrent Protection - Uses Lower MOSFET’s r See Table 1. ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C Pinout www.DataSheet4U.com Block Diagram SAMPLE AND HOLD 10µA TO LGATE/OCSET FB 5V INT. 20µA COMP/EN VOS 2 ISL6341, ISL6341A, ISL6341B, ISL6341C (10 LD 3x3 TDFN) TOP VIEW BOOT 1 10 PHASE 2 9 UGATE 3 8 LGATE/OCSET 4 7 GND 5 6 POR AND + SOFT-START - OC COMPARATOR 5V INT ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C Typical Application www.DataSheet4U.com TYPE II COMPENSATION SHOWN OFFSET 12V DCPL 5V TO 12V VCC BOOT 6 PGOOD BOOT PHASE 2 COMP/EN ISL6341x 7 UGATE LGATE/OCSET VOS GND R OCSET R R VOS1 S R VOS2 ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C Absolute Maximum Ratings Supply Voltage GND - 0.3V to 15V CC www.DataSheet4U.com BOOT Voltage ( GND - 0.3V to 36V BOOT-GND BOOT to PHASE Voltage ( BOOT PHASE -0.3V to 16V (<10ns, 10µJ) UGATE Voltage ( UGATE PHASE V - 3.5V (<100ns Pulse Width, 2µ PHASE LGATE/OCSET Voltage ( GND - 0. LGATE GND - 5V (< ...
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... NOTES: 3. Limits should be considered typical and are not production tested. 4. Limits established by characterization and are not production tested. 5. The UVP is disabled on the ISL6341C; no trip point is measured. Functional Pin Description VCC (Pin 6) This pin provides the bias supply for the ISL6341x, as well as the lower MOSFET’ ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C Pulling COMP/EN low (V = 0.7V nominal) will ENABLE disable the controller, which causes the oscillator to stop, the LGATE and UGATE outputs to be held low, and the soft-start www.DataSheet4U.com circuitry to re-arm. The external pull-down device will initially need to overcome up to 5mA of COMP/EN output current. ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C . www.DataSheet4U.com SWITCHING COMP/EN (0.25V/DIV) 0.7V LGATE/OCSET 0.25V/DIV GND> GND> GND> GND> 0.8ms 4.0ms 4.0ms FIGURE 2. LGATE/OCSET AND SOFT-START OPERATION From t1, there is a nominal 4ms delay, which allows the VCC pin to rise. At the same time, the LGATE/OCSET pin is initialized by disabling the LGATE driver and drawing I (nominal 10µ ...
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... ISL6341A, ISL6341C Figure 5 shows the same conditions for the ISL6341A, ISL6341C. For this version, when overcurrent is first detected (while LGATE is high), the logic will shut off the output (LGATE and UGATE both go low), and the current goes to zero. It will then go into a “ ...
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... The ISL6341C removes that uncertainty by disabling the UVP, and relying only on the OCP. Note that for the other 3 versions, if OCP trips first, it locks out the UVP from also tripping, so that only the OCP response (and recovery) are active ...
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... V is pulled low by the disturbance, as well as the OUT load rate determine by the conditions, and the output components. The ISL6341C version does not have UVP; it relies on the OCP for shorted loads. The PGOOD UV comparator is separate, and is still active (0.25V/DIV) ...
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... Output Voltage Selection The output voltage can be programmed to any level between the 0.8V internal reference the V 85% duty cycle restriction for the ISL6341, ISL6341C (75% for the ISL6341A, ISL6341B). Additional duty cycle margin due to the r load needs to be factored in as well. ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C repeated 0.8V, then R OUT OFFSET Output voltages less than 0.8V are not available www.DataSheet4U.com • 0.8V --------------------------- OUT R O • R 0.8V S ---------------------------------- – 0.8V OUT The VOS pin is expected to see the same ratio for its resistor divider; R should also be chosen in the 1kΩ to 5kΩ ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C . V IN ISL6341x www.DataSheet4U.com UGATE Q 1 PHASE Q 2 LGATE/OCSET RETURN FIGURE 11. PRINTED CIRCUIT BOARD POWER AND GROUND PLANES OR ISLANDS Figure 11 shows the critical power components of the converter. To minimize the voltage overshoot, the interconnecting wires indicated by heavy lines should be part of a ground or power plane in a printed circuit board ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C The compensation network consists of the error amplifier (internal to the ISL6341x) and the external R components. The goal of the compensation network is to www.DataSheet4U.com provide a closed loop transfer function with high 0dB crossing frequency (F ; typically 0 margin (better than 45°). Phase margin is the difference ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C frequency. When designing compensation networks, select target crossover frequencies in the range of 10% to 30% of the switching frequency www.DataSheet4U.com SW This is just one method to calculate compensation components; there are variations of the compensation break frequency equations. The error amp is similar to that on other Intersil regulators, so existing tools can be used here as well ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C For a through-hole design, several electrolytic capacitors may be needed. For surface mount designs, solid tantalum capacitors can also be used, but caution must be exercised www.DataSheet4U.com with regard to the capacitor surge current rating. These capacitors must be capable of handling the surge current at power-up ...
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... ISL6341, ISL6341A, ISL6341B, ISL6341C Thin Dual Flat No-Lead Plastic Package (TDFN) www.DataSheet4U.com INDEX AREA TOP VIEW C SIDE VIEW SEATING PLANE D2 7 (DATUM B) D2 INDEX AREA (DATUM N (Nd-1)Xe REF. BOTTOM VIEW C L (A1 SECTION "C-C" ...