ISL6617CRZ Intersil, ISL6617CRZ Datasheet - Page 2

• Manufacturer Part Number: ISL6617CRZ
• Description: Phase Splitter, Commercial, 10LD 3X3 DFN
• Manufacturer: Intersil

Functional Pin Descriptions
Block Diagram
PIN # PIN SYMBOL
10
11
1
2
3
4
5
6
7
8
9
EN_PH_SYNC Driver Enable and Mode Selection Input. See Enable and Mode Operation for more details.
ISENA+
ISENB+
ISENA-
PWMIN
ISENB-
PWMB
PWMA
IOUT
GND
VCC
Output of the differential amplifier for Channel A. Connect a resistor on this pin to the negative rail of
the sensed voltage to set the current gain.
Input of the differential amplifier for Channel A. Typically, the positive rail of sensed voltage via DCR
sensing network connects to this node.
The PWM input signal triggers the J-K flip flop and alternates its input to channel A and B. Both channels
are effectively modulated. The PWM signal can enter three distinct states during operation, see
Operation section for further details. Connect this pin to the PWM output of the controller. The pin is
pulled to VCC when EN_PH_SYNC is low.
Output of the differential amplifier for Channel B. Connect a resistor on this pin to the negative rail of
the sensed voltage to set the current gain.
Input of the differential amplifier for Channel B. Typically, the positive rail of sensed voltage via DCR
sensing network connects to this node.
PWM output of Channel B with Tri-state feature.
Current monitoring Output. It sources out the average current of both Channel A and B.
Connect this pin to a +5V bias supply. It supplies power to internal analog circuits. Place a high quality
low ESR ceramic capacitor from this pin to GND.
PWM output of Channel A with Tri-state feature.
Bias and reference ground. All signals are referenced to this node. Place a high quality low ESR ceramic
capacitor from this pin to VCC. Connect this pad to the power ground plane (GND) via thermally
enhanced connection.
EN_PH_SYNC
2
PWMIN
IOUT
GND
VCC
BALANCE BLOCK
CURRENT
ISL6617
ISL6617
55k
48k
CONTROL
LOGIC
FUNCTION
ISENA-
ISENA+
PWMA
PWMB
ISENB-
ISENB+
CHANNEL A
CHANNEL B
February 4, 2010
FN7564.0