ISL6558 Intersil Corporation, ISL6558 Datasheet
ISL6558
Available stocks
Related parts for ISL6558
ISL6558 Summary of contents
Page 1
... Data Sheet Multi-Purpose Precision Multi-Phase PWM Controller With Optional Active Voltage Positioning The ISL6558 is a multi-phase PWM controller, which in combination with TM the HIP6601B, HIP6602B, HIP6603B, or ISL6605 companion gate drivers form a complete solution for high-current, high slew-rate applications. The ISL6558 regulates output ...
Page 2
... COMP 3 14 DROOP VSEN 6 11 FS/ GND 8 2 ISL6558 PWM4 ISEN4 ISEN1 PWM1 PWM2 ISEN2 ISEN3 9 PWM3 ISL6558 (20 LEAD 5X5 QFN) TOP VIEW COMP DROOP VSEN ISEN1 PWM1 PWM2 ...
Page 3
... Block Diagram VSEN - + X 0 X1.15 AND FAULT COMP 0.8V REFERENCE FB DROOP 3 ISL6558 V PGOOD CC POWER-ON RESET (POR LATCH CLOCK AND S SAWTOOTH GENERATOR + ∑ ∑ SOFT- START LOGIC - + ∑ ∑ + E/A - CURRENT CORRECTION + I TOTAL + ∑ TRIP GND THREE-STATE + PWM - + PWM - + PWM - + PWM - - PHASE NUMBER CHANNEL ...
Page 4
... The undervoltage and overvoltage protection comparators trigger off this input. 4 ISL6558 FS/EN (Pin 7) Connecting a resistor from this pin to ground sets the internal oscillator frequency. The switching frequency the converter is adjustable between 80kHz and 1.5MHz. ...
Page 5
... FB FB DROOP COMP V CC VSEN PWM4 R OS PWM3 PGOOD PWM2 PWM1 PWM CONTROL ISL6558 ISEN4 ISEN3 FS/EN ISEN2 R T ISEN1 GND 5 ISL6558 +5V BOOT PVCC UGATE VCC +5V PHASE C DRIVER C PWM HIP6601B LGATE GND +5V BOOT PVCC UGATE PHASE VCC NC DRIVER PWM HIP6601B LGATE GND ...
Page 6
... ISL6558IB, ISL6558IR - ISL6558CB, ISL6558CR ISL6558IB, ISL6558IR - 100kΩ. ±1% T See Figure 3 Maximum voltage at FS/EN to disable controller 10K to ground 100pF 10K to ground 100pF, Load = ±400µA ...
Page 7
... DROOP I DROOP I TOTAL - ∑ ∑ CORRECTION FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE ISL6558 VOLTAGE AND CURRENT CONTROL LOOPS CONFIGURED FOR A TWO CHANNEL CONVERTER 7 ISL6558 TEST CONDITIONS VSEN Rising VSEN Falling I = 4mA PGOOD VSEN Rising, ISL6558CB, ISL6558CR, T ...
Page 8
... V millivolts of offset help reduce the size and cost of output capacitors required to handle a given load step. Droop is an optional feature of the ISL6558 implemented by connecting the DROOP and FB pins as shown in Figure 1. An internal current source, I feeds out of the DROOP pin. The magnitude of I ...
Page 9
... OUT NL Initialization Many functions are initiated by a rising supply voltage applied to the VCC pin of the ISL6558. Until the supply voltage reaches the Power-On Reset (POR) VCC rising threshold, the PWM drive signals are held in three-state. This results in no gate drive generation by the HIP660x gate drivers to the output MOSFETs ...
Page 10
... Fault Protection The ISL6558 protects the load device from damaging stress levels. The overcurrent trip point is integral in preventing output shorts of varying degrees from causing current spikes which would damage a load device. The output voltage detection features insure a safe window of operation for the load device ...
Page 11
... OC trip ratio is determined. 82.5µ ---------------------- - I TOTAL 11 ISL6558 The new overcurrent trip ratio is then used to calculate the . The overcurrent ISEN resistors for the new full load reference current. exceeds TOTAL R ISEN One commonly over looked component which will change ...
Page 12
... Place the HIP660x gate drivers close to their respective channel MOSFETs. The critical small signal components include the bypass capacitors for VCC on the ISL6558 controller as well as those on VCC and PVCC of the HIP660x gate drivers. Position the bypass capacitors, C pins especially important to place the feedback ...
Page 13
... Aluminum electrolytic capacitor ESR values are related to case size with lower ESR available in larger case sizes. However, the ESL of these capacitors increases with case size and can reduce the usefulness of the capacitor to high slew-rate transient loading. Unfortunately, 13 ISL6558 +12V C BP VCC PVCC ...
Page 14
... FIGURE 11. CURRENT MULTIPLIER vs DUTY CYCLE MOSFET SELECTION AND CONSIDERATIONS The ISL6558 requires two N-Channel power MOSFETs per 0.4 0.5 active channel or more if parallel MOSFETs are employed These MOSFETs should be selected based upon r total gate charge, and thermal management requirements. ...
Page 15
... Quad Flat No-Lead Plastic Package (QFN) Micro Lead Frame Plastic Package (MLFP) 15 ISL6558 L20.5x5 20 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VHHC ISSUE C) MILLIMETERS SYMBOL MIN NOMINAL A 0. 0.23 D 5.00 BSC D1 4.75 BSC D2 2.95 E 5.00 BSC E1 4.75 BSC E2 2. 0. θ ...
Page 16
... 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 16 ISL6558 M16.15 (JEDEC MS-012-AC ISSUE C) 16 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE ...