isl6341a Intersil Corporation, isl6341a Datasheet
isl6341a
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isl6341a Summary of contents
Page 1
... The PWM duty cycles range from 0% to around 85% at 300kHz (75% at 600kHz). The frequency, duty cycle and OCP are the only differences among the ISL6341, ISL6341A, ISL6341B. See Table 1 for a summary. Protection from overcurrent conditions is provided by ...
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... Pinout Block Diagram SAMPLE AND HOLD 10µA TO LGATE/OCSET FB 5V INT. 20µA COMP/EN VOS 2 ISL6341, ISL6341A, ISL6341B ISL6341, ISL6341A, ISL6341B (10 LD 3x3 TDFN) TOP VIEW BOOT 1 10 PHASE 2 9 UGATE 3 8 LGATE 4 7 GND 5 6 POR AND + SOFT-START - OC COMPARATOR 5V INT. ERROR PWM ...
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... Typical Application TYPE II COMPENSATION SHOWN OFFSET 3 ISL6341, ISL6341A, ISL6341B 12V DCPL 5V TO 12V VCC 6 BOOT 10 1 PGOOD C BOOT PHASE 2 COMP/EN ISL6341, 7 UGATE ISL6341A, 3 ISL6341B LGATE/OCSET VOS GND R OCSET R R VOS1 S R VOS2 ...
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... Upper Gate Sink Impedance Lower Gate Source Impedance Lower Gate Sink Impedance Upper Gate Source Impedance 4 ISL6341, ISL6341A, ISL6341B Thermal Information Thermal Resistance (Typical TDFN Package (Notes 1, 2 GND - 0.3V to 15V Maximum Power Dissipation 1.0W Maximum Junction Temperature (Plastic Package +150° ...
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... VOS Bias Current PGOOD Functional Pin Description VCC (Pin 6) This pin provides the bias supply for the ISL6341, ISL6341A, ISL6341B, as well as the lower MOSFET’s gate. An internal regulator will supply bias as VCC rises above 5V, but the LGATE/OCSET will still be sourced by VCC. Connect a well-decoupled 5V to 12V supply to this pin ...
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... OUT If the COMP/EN pin is held low during power-up, that will just delay the initialization until it is released and the COMP/EN voltage is above the V trip point. ENABLE 6 ISL6341, ISL6341A, ISL6341B ). This pin is also CC CC GND> GND> GND> GND> ...
Page 7
... If the output is pre-biased to a voltage less than the expected value (as shown by the magenta curve), the ISL6341, ISL6341A, ISL6341B will detect that condition. Neither MOSFET will turn-on until the soft-start ramp voltage exceeds the output; V ...
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... OCP is always enabled during soft-start (UV is not); it will need the three consecutive trips to latch off. ISL6341A Figure 5 shows the same conditions for the ISL6341A. 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 ...
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... ISL6341, ISL6341A, ISL6341B MOSFETs for the ISL6341, ISL6341A, ISL6341B are not expected to handle the power of the maximum trip point. Any voltage setting above 600mV will clamp to the maximum setting. No resistor at all should give the clamped maximum value (unless the loading on the LGATE prevents charging the node fully). However, a resistor (> ...
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... VOS) and the falling UV trip point (10% below 0.8V = 0.72V nominal on VOS) will trip sooner 10 ISL6341, ISL6341A, ISL6341B than the protection, in order to give an early warning to a possible problem. The response time of the comparators should be less than 1µs; the separate VOS input is not slowed down by the compensation on the FB pin ...
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... PGOOD goes low if OCP trips after SS (OCP) Switching Frequency The switching frequency is a fixed 300kHz for the ISL6341, and 600kHz for the ISL6341A, ISL6341B. It cannot be adjusted externally, and the various soft-start delays and ramps are fixed at the same times for either frequency. Output Voltage Selection The output voltage can be programmed to any level between the 0 ...
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... The components shown should be located as close together as possible. Please note that the capacitors C represent numerous physical capacitors. For best results, locate the ISL6341, ISL6341A, ISL6341B within 1 inch of the MOSFETs, Q and Q . The circuit traces for the MOSFET gate ...
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... UGATE HALF-BRIDGE DRIVE PHASE LGATE ISL6341, ISL6341A, ISL6341B EXTERNAL CIRCUIT FIGURE 13. VOLTAGE-MODE BUCK CONVERTER COMPENSATION DESIGN The compensation network consists of the error amplifier (internal to the ISL6341, ISL6341A, ISL6341B) and the external components. The goal of the compensation network is to provide a closed loop transfer function with high 0dB crossing frequency (F ...
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... One of the parameters limiting the converter’s response to a load transient is the time required to change the inductor current. Given a sufficiently fast control loop design, the ISL6341, ISL6341A, ISL6341B will provide either 0% or 100% duty cycle in response to a load transient. The response time is the time required to slew the inductor current from an initial current value to the transient current level ...
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... N-MOSFETs. Look for r should be exercised with devices exhibiting very low V GS(ON) present aboard the ISL6341, ISL6341A, ISL6341B may be circumvented by these MOSFETs if they have large parasitic impedences and/or capacitances that would inhibit the gate of the MOSFET from being discharged below its threshold level before the complementary MOSFET is turned on. Also avoid MOSFETs with excessive switching times ...
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... VCC ISL6341, BOOT ISL6341A, C BOOT ISL6341B Q1 UGATE PHASE VCC LGATE/OCSET GND FIGURE 15. UPPER GATE DRIVE BOOTSTRAP 16 ISL6341, ISL6341A, ISL6341B ≈ G ≈ G-S CC FN6538.0 August 20, 2007 ...
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... 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. For information regarding Intersil Corporation and its products, see www.intersil.com 17 ISL6341, ISL6341A, ISL6341B L10.3x3B 10 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE 0.15 ...