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L9911

Table 6. Load Response Control Parameters

Table 7. Load Response Control Timing Options

Table 8. Correspondence of Frequency (typical values) to Application Features

Considering the overall WW application scenario, there is a direct correspondence between Typical Con-

figurations A/B and regulation curve Vreg-1, and between Typical Configuration C and regulation curves

Vreg-2 and Vreg-3. This is allowing the summary of all possible customizations for L9911 in the table be-

low.

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

t_ST_1

Soft Start Delay Time (Fig.

13) 2 steps available,

selectable by mask option

(see Table.7).

Activated always at engine start

0

s

t_ST_2

1.7322.35

t_SL_1

Soft Attack Time / Soft Start

Time (Fig. 13). 2 steps

available, selectable by mask

option (see Table 7).

From 0 to 100% field duty cycle

2.13

2.5

2.87

s

t_SL_2

7.65

9

10.35

EN-RES

(constant)

Reset frequency range to

enable regulation; Frequency

judged after 4 periods (Fig.

12)

40

50

60

Hz

EN-1

Soft start enable (EN) and

LRC disable (DISAB)

frequency ranges.

4 configurations available,

selectable by mask option

(possible combinations in

Table 8). Always activated at

engine start. Frequencies

judged after 4 periods (Fig.

12)

Tj = 25ºC

Tj = -40 to150ºC

108

102

120

120

132

138

Hz

Hz

EN-2

Tj = 25ºC

Tj = -40 to150ºC

131

124

145

145

159

166

Hz

Hz

EN-3

Tj = 25ºC

Tj= -40 to150ºC

144

136

160

160

176

184

Hz

Hz

EN-4

Tj = 25ºC

Tj = -40 to150ºC

174

165

193

193

212

221

Hz

Hz

DISAB-1

Tj = 25ºC

Tj = -40 to150ºC

270

255

300

300

330

345

Hz

Hz

DISAB-2

Tj = 25ºC

Tj = -40 to150ºC

315

298

350

350

385

402

Hz

Hz

DISAB-3

Tj = 25ºC

Tj = -40 to150ºC

367

347

408

408

449

469

Hz

Hz

DISAB-4

Tj = 25ºC

Tj = -40 to150ºC

420

397

466

466

512

535

Hz

Hz

t_SL = 2.5s

t_SL = 9s

t_ST = 0s

LRC-A

LRC-D

t_ST = 2s

LRC-C

LRC-B

Alternator Revolution Speed (rpm)

6 Pole Pairs

8 Pole Pairs

Typical Configuration

A (Config-A)

Initiate Regulation

1200

EN-1

EN-3

LRC Cut

3000

DISAB-1

DISAB-3

Typical Configuration

B (Config-B)

Initiate Regulation

1450

EN-2

EN-4

LRC Cut

3000

DISAB-1

DISAB-3

Typical Configuration

C (Config-C)

Initiate Regulation

1450

EN-2

EN-4

LRC Cut

3500

DISAB-2

EN-4