参数资料
| 型号： | ISL78225ANEZ-T |
| 厂商： | Intersil |
| 文件页数： | 8/22页 |
| 文件大小： | 0K |
| 描述： | IC PWM CONTROLLER |
| 标准包装： | 1,000 |
| 系列： | * |
ISL78225
Electrical Specifications Operating Conditions: V IN = 12V, T A = -40°C to +125°C, unless otherwise specified. Typical specifications are
at T A = +25°C. Boldface limits apply over the operating temperature range, -40°C to +125°C. (Continued)
MIN
MAX
PARAMETER
V REF2 External Reference Voltage Range
V REF2 External Reference Voltage Accuracy
TEST CONDITIONS
-40°C to +125°C, measure at FB pin, V REF2 = 1.8V
(Note 6)
0.7
-1
TYP
(Note 6)
1.8
1
UNITS
V
%
ERROR AMPLIFIER
Transconductance Gain
Output Impedance
-40°C to +125°C, measure at FB pin, V REF2 = 0.7V
-1.5
2
5
1.5
mS
M ?
Unity Gain Bandwidth
Slew Rate
Output Current Capability
Maximum Output Voltage
Minimum Output Voltage
C COMP = 100pF from COMP pin to GND
C COMP = 100pF from COMP pin to GND
3.5
11
2.5
±300
0.5
MHz
V/μs
μA
V
V
PWM CORE
Duty Cycle Matching
Zero Crossing Detection (ZCD) Threshold for
PWM1/PWM2
Leading Edge Blanking (Audio Mode)
Leading Edge Blanking (Other Mode)
I ISENxP = 60μA, R SLOPE = 30.1k, f S = 250kHz,
V COMP = 2V, 4-phase, T A = +25°C
R SEN1, 2 = 750 ?
V MODE = VCC, V PWM_TRI = VCC, V COMP = 0.5V
V MODE <4V or V PWM_TRI = GND, V COMP = 0.5V
-6
3
Ts/12
(Note 8)
130
6
%
mV
ns
ns
SLOPE pin Voltage
ISENxN Bias Current
V ISENxN = V ISENxP , from V IN - 1V to V IN
385
515
0.3
650
mV
μA
ISENxN, ISENxP Common Mode Voltage
Range
V IN > 12V
V IN -5
V IN
V
PWMx OUTPUT
PWMx Output Voltage LOW
PWMx Output Voltage HIGH
I PWMx = -500μA
I PWMx = +500μA
4.5
0.5
V
V
PWMx Tri-State Output Voltage
I PWMx = ±100μA
2.3
2.5
2.7
V
PWMx Pull-Down Current
PWM3, PWM4 Disable Threshold
During Phase Detection Time (t 3 on Figure 14), V PWM = 1V
During Phase Detection Time (t 3 on Figure 14)
3.5
50
μA
V
PHASE ADDING/DROPPING
MODE Pull-up Current
V IOUT Threshold, 4-phase, Drop Phase 4
V IOUT Threshold, 4-phase, Drop Phase 3
V IOUT Threshold, 3-phase, Drop Phase 3
V MODE = 2.4V
V MODE = 1.6V
V MODE = 1.6V
V MODE = 1.8V
4.2
1.175
0.775
1.175
5.1
1.2
0.8
1.2
5.6
1.225
0.825
1.225
μA
V
V
V
V IOUT Threshold Hysteresis
40
mV
Phase Drop Disable Threshold at MODE pin
3.5
4
V
CURRENT SENSE AND OVERCURRENT PROTECTION
Peak Current Limit for Individual Channel
160
μA
IOUT Current Tolerance
I ISENxP = 60μA, 4-phase
173
187
200
μA
Maximum Voltage Limit at IOUT Pin
DMAX PIN
DMAX Threshold, High
DMAX Threshold, Low
3
2.0
2
V
V
V
DMAX Floating Voltage
8
During Phase Detection Time (t 3 on Figure 14)
2.5
V
FN7909.3
February 11, 2014
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